3D Maxpider
Floor mats
http://floor-liners.com/
ACL
Performance engine bearings
http://aclperformance.eu/
ACT
Clutches
http://www.advancedclutch.com/
Addictive Desert Designs
Truck and off road bumpers and equipment
http://www.addictivedesertdesigns.com/
Advan
Yokohama wheels
http://www.yokohamawheel.jp/
AEM Electronics
Performance electronics and fuel pumps
http://www.aemelectronics.com/
AEM Intakes
Engine intake components and filters
http://www.aemintakes.com/
Aeromotive
Fuel system components
http://aeromotiveinc.com/
aFe
Offroading components - cooling, fuel system, coilovers
http://afepower.com/
Agency Power
Offroading components - intakes, brakes, exhaust, fuel system, pulleys, suspension, transmission parts and turbocharging
http://www.agencypower.com/
Air Lift
Air suspension components
http://www.airliftperformance.com/
Airaid
Engine intake components and filters
http://www.airaid.com/
AirDog
Performance diesel glow plug systems
http://pureflowairdog.com/
Airtec Motorsport
Intercoolers
http://www.airtecmotorsport.com/
Akrapovič
Akrapovič produce extremely high quality exhaust systems which utilize materials like inconel, titanium and carbon fibre. Akrapovič offer a selection of exhausts for everything from Audi and BMW to Porsche, Lamborghini and McLaren. Kits with which you can control the sound of your exhaust wirelessly are also available.
http://www.akrapovic.com/
Alcon
Performance brakes and clutches
http://www.alcon.co.uk/
AlphaRex
Performance headlights for trucks
http://alpharexusa.com/
Alpinestars
Race suits and footwear
http://www.alpinestars.com/
Alta
Performance products for Mini Cooper
http://altaperformance.com/
American Force
High-end truck wheels
http://americanforcewheels.com/
American Racing
Custom wheels
http://www.americanracing.com/
American Racing Headers
Performance exhaust headers and components
http://americanracingheaders.com/
AMP Research
Powersteps, bedsteps, bed extenders
http://www.amp-research.com/
AMS
High performance engine and tuning components
http://www.amsperformance.com/
Anderson Composites
Carbon and composite panels for American cars
http://andersoncomposites.com/
ANZO
Aftermarket head, tail, bumper and other lights
http://www.anzousa.com/
AP Racing
Performance brakes, pedalboxes, clutches etc
http://apracing.com/
AP Suspension
Coilover suspension
http://www.apcoilovers.com/
Arai Helmets
Helmets
http://www.araihelmet.eu/
Arai Motorsport
Subaru motorsport and aftermarket components
http://www.araimotorsport.com/
ARB
Offroad components and equipment
http://arbusa.com/
Armytrix
High-end exhaust system components
http://www.armytrix.com/
ARP
Performance engine bolts and nuts
http://arp-bolts.com/
Asanti
Forged wheels
http://www.asantiwheels.com/
AST
Coilover suspension for cars and motorcycles
http://www.ast-suspension.com/
Atech
Safety equipment - seats, harnesses and other products
http://www.atech-racing.com/
Athena
Engine components and wheel spacers
http://www.athena.eu/en-us/
ATI
High-performance drag racing components
http://www.atiracing.com/
ATL
Flexible fuel tanks for motorsport and military
http://www.atlltd.com/
ATP
Premium turbocharging components
http://www.atpturbo.com/
ATS Diesel
Transmission and intake/exhaust components for American trucks
http://www.atsdiesel.com/
Auto-Tech Interiors
Cluster gauges
http://autotechinteriors.com/
AutoMeter
Digital clusters and gauges
http://www.autometer.com/
AVO
Turbocharging parts for Subarus
http://avoturboworld.com/
AWE Tuning
Intake and exhaust components
http://www.awe-tuning.com/
Baja Designs
Off-road lighting
http://www.bajadesigns.com/
Banks Power
Truck performance equipment - intake, exhaust, gauges, diff covers
http://www.bankspower.com/
Bar-Tek
Audi, VW and other VAG performance engine components
http://www.bar-tek-tuning.com/
BBK
Performance components
http://www.bbkperformance.com/
BBS
World famous German wheels
http://bbs.com/
BD Diesel
Performance components for American cars
http://bddiesel.com
BedRug
Truck bed rugs
http://bedrug.com/
Bell
Motorsport helmets
http://bellracing.eu/
Beltech
Truck lift and lowering kits and other suspension components
http://www.belltech.com/
Beyern
Aftermarket wheels for BMW
http://www.beyernwheels.com
Bilstein
Springs, dampers and other suspension components
http://www.bilstein.com/
Black Rhino
Truck, van and off road wheels
http://www.blackrhinowheels.com/
Blitz
Japanese performance and tuning equipment
http://www.blitz.co.jp/
BLOX Racing
High quality performance products for sport cars
http://bloxracing.com
Blueprint Engines
Crate engines
http://blueprintengines.com/
BMC Air Filter
Air filters, airboxes and intake systems
http://www.bmcairfilters.com/
BMR Suspension
Suspension and chassis components for American cars
http://www.bmrsuspension.com/
Boostline rods
Performance connecting rods
http://www.bmrsuspension.com/
BorgWarner
Well, they do everything, but their turbochargers are really well known
http://www.borgwarner.com/aftermarket/
Borla
Exhaust systems
http://www.borla.com/
Bosch
There probably isn't a component on a car which they don't produce. Most common products from them in the motorsport world are probably the fuel pumps.
http://www.boschaftermarket.com/
Boundary
Oil pumps and gears
http://www.boundarypumps.com/
Braid
Aftermarket and motorsport wheels
http://www.braid.es/
Brembo
Brakes, standard and high-performance
http://www.brembo.com/
Brian Crower
Engine components
http://briancrower.com/
Bride
Aftermarket seats
http://bride-jp.com/en/
Bridgeway
Crankshafts, connecting rods (even for Ladas)
http://www.bwcrank.com/
BullRight Industries
Truck bed covers
http://builtrightind.com/
Bully Dog
Truck chip tuning
http://www.bullydog.com/
Bushwacker
Truck fender flares
http://www.bushwacker.com/
Carven Exhaust
Truck exhaust systems
http://www.carvenexhaust.com/
Castrol
Oils and lubricants
http://www.castrol.com/
Clevite
Engine components, now known as Mahle
http://www.mahle-aftermarket.com/
Clutch Masters
Performance clutches
http://www.clutchmasters.com/
COBB
Engine electronics and tuning
www.cobbtuning.com/
Cobra Exhausts
Performance exhaust systems
http://cobrasport.com/
Codrive.Me
Pacenote books from the main man, Kuldar Sikk
http://codrive.me/
Cometic Gaskets
Engine seals and gaskets
http://www.cometic.com/
COMP Cams
Performance camshafts and other engine components
http://www.compcams.com/
Competition Clutch
Performance clutches
http://competitionclutch.com/base-uk/
CORSA Performance
Performance exhaust systems
http://www.corsaperformance.com/
Cosworth Performance Parts
Engines and their management systems
http://www.cosworth.com/
CP Carrillo
Performance pistons, connecting rods and other engine components
http://www.cp-carrillo.com/
Cray
Wheels for Corvettes
http://www.craycorvettewheels.com
CSF
Performance cooling systems
http://csfrace.com/
CTEK
Best battery chargers
http://www.ctek.com/
Curt
Hitching/towing equipment
http://www.curtmfg.com/
Cusco
Performance coilovers and drivetrain/transmission components
http://www.cusco.co.jp/en/
DART
High-end engine components
http://dartheads.com/
Darton Sleeves
Sleeves for American engines
http://dartonsleeves.com/
DBA
Performance brake discs and pads
http://dba.com.au/
DDP - Dynomite Diesel Products
Performance diesel injectors
http://dynomitediesel.com/
DeatschWerks
Fuel injectors, pumps, rails, regulator, filters, fittings and tanks
http://deatschwerks.com/
Defi
Motorsport gauges
http://www.defi-shop.com/
DEI - Design Engineering Inc
Thermal insulation, heat shields and wraps
http://www.designengineering.com/
Denso
Ignition components, spark plugs
http://densoautoparts.com/
Diamond Eye Performance
Exhaust components with diesel in mind
http://www.diamondeyeperformance.com/
DKM Clutch
Performance clutches
http://www.dkmclutch.com/
Driveshaft Shop
Performance driveshafts, propshafts and axles
http://www.driveshaftshop.com/
DUB
High bling wheels
http://www.dubwheels.com/
DV8 Offroad
Bumpers with off road in their mind
http://dv8off road.com/
Eagle
Crankshafts, connecting rods and their assemblies
http://www.eaglerod.com/
EBC Brakes
Performance brake systems for cars, motorcycles, scooters and bicycles
http://ebcbrakes.com/
Edelbrock
Performance engine stuff, from sensoirs to crate engines and everything inbetween
http://www.edelbrock.com/
EFX Tires
Offroad and golf cart tyres
http://www.efxtires.com/
Eibach
Suspension components, springs, spacers and adapters
http://www.eibach.de/en
Endless
High performance brakes ranging from street applications to autocross, rally, sprint and all the way to endurance racing. Whether you need trackday pads or a full motorsport solution, Endless has it covered. Endless produces brake discs, pads, calipers, brake lines and high performance brake fluid.
http://endless-sport.co.jp/
Energy Suspension
Polyurethane bushings and components
http://energysuspension.com/
Enkei
Lightweight wheels
http://enkei.com/
EVO Corse
Racing alloy wheels
http://evocorse.com/
Exedy
Performance clutches
http://www.exedy-racing.com/racing/en/
Exergy
Diesel fuel injectors and pumps
http://www.exergyperformance.com/
Extreme 14
Silicone hoses and custom made brake lines
http://extreme14.co.uk/
Fabtech
Offroad equipment - shocks, arms and tyres
http://fabtechmotorsports.com/
Facet
Fuel pumps
http://www.facet-purolator.com/
Fairway Alloys
Golf cart wheels
http://fairwayalloys.com/
FASS Fuel Systems
Diesel fuel system components
http://fassride.com/
FAST Fuel Air Spark Technology
Intake components, manifold, ignition coils etc
http://www.fuelairspark.com/
Ferodo
Performance brake pads
http://www.ferodo.com/
Ferrea
High-performance competition engine valves
http://www.ferrea.com/
Fidanza
Aluminium and steel flywheels, adjustable camshaft gears, short throw shifters
http://www.fidanza.com/
Fi-Exhaust
A quality exhaust manufacturer using a lot of valves for the best sound.
http://www.fi-exhaust.com/
fifteen52
Performance and off-road wheels
http://fifteen52.com/
Firestone
American tyres
http://www.firestonetire.com/
Fleece Performance
Diesel engine performance components
http://www.fleeceperformance.com/
Fluidampr
Performance damper pulleys
http://fluidampr.com/
Foose
Chip Foose Design wheels
http://www.foosedesignwheels.com/
Ford Performance
Ford performance parts
http://performanceparts.ford.com/
Forge Motorsport
Actuators, wastegates, intercoolers, valves etc
http://www.forgemotorsport.com/
FOX
Performance shock absorbers
http://www.ridefox.com/
Fuel Off-Road
Off-road wheels for trucks and UTVs
http://www.fueloff road.com/
Fuelab
Fuel system components
http://www.fuelab.com/
Fujitsubo exhaust
JDM aftermarket exhaust systems
http://www.fujitsubo.co.jp/
G-Sport
Aftermarket performance catalytic converters
http://gsportbygesi.com/
Garrett
Turbochargers
http://www.garrettmotion.com/racing-and-performance/
Gates
Timing and serpentine belts, including racing belts
http://www.gates.com/
GAZ Shocks
Adjustable dampers for road and motorsport
http://www.gazshocks.com/
Gibson
Aftermarket exhaust systems
http://gibsonperformance.com/
Giro Disc
Performance brake discs, pads etc
http://www.girodisc.com/
Glencoe
Fuel system components
http://www.glencoeltd.co.uk/
Go Fast Bits
Performance components - blow offs, boost controllers, wastegates, pulleys etc
http://gfb.com.au/
Go Rhino
Offroad body equipment
http://www.gorhino.com/
Goodridge
Fittings, hoses and pipes
http://goodridge.com/
Gorilla Automotive
Wheel lug nuts and other automotive products
http://www.gorilla-auto.com/
Gram Lights
Rays aftermarket wheel brand
http://www.rayswheels.co.jp/products/brand_detail.php?lang=en&brand=GRAM
Grams Performance
Fuel system components, injectors and throttle bodies
http://gramsperformance.com/
Grayston
Fasteners, locks and other necessities
http://www.grayston.biz/
Greddy
Tuning equipment
http://www.greddy.com/
Green Filter
High performance air filters
http://greenfilter.com/
GrimmSpeed
Tuning and performance products
http://www.grimmspeed.com/
Griots Garage
Car care products
http://www.griotsgarage.com/
GSC Power Division
Performance camshafts, valves, their springs and guides
http://www.power-division.com/
H&R Suspension
Aftermarket springs, anti-roll bars, coilovers and spacers
http://www.h-r.com/en-index/
Haltech
Electrical components, wiring harnesses, sensors
http://www.haltech.com/
Hawk Performance
Aftermarket brake components
http://www.hawkperformance.com/
HEL Performance
Billet brake calipers and master cylinders
http://www.helperformance.com/
Helix Clutch
Precision clutches and flywheels
http://helixautosport.com/
Hella
Lighting of every kind
http://www.hella.com/
Helo Wheels
Aftermarket wheels
http://www.helowheels.com/
HKS
HKS are the biggest and one of the highest quality Japanese aftermarket manufacturers. They produce high quality parts from blow off valves, turbos and superchargers, to engine specific oils (EJ, 4G63, RB etc). If you have a Japanese car, chances are HKS makes a tuning part for it. Super Turbo or Legamax Mufflers, Hipermax series of coilvers, Racing Suction intakes, Super SQV blow offs are products most JDM enthusiasts are surely familiar with.
http://www.hks-power.co.jp/en/index.html
Hotckis Sport Suspension
Aftermarket suspension components
http://www.hotchkis.net
HP Tuners
OBD logging and flashing
http://www.hptuners.com/
Husky Liners
All kinds of mats, liners, mud guards and protection
http://www.huskyliners.com/
Hyper Rev Magazine
JDM tuning magazine, a bible
http://isaacviel.name/list-of-all-hyper-rev-issues-vol-1-225-1993-2018/
ICON
Offroad suspension systems, shocks, guards and alloys
http://www.iconvehicledynamics.com/
Industrial Injection
Diesel truck aftermarket parts
http://www.industrialinjection.com/
Injector Dynamics
High-performance fuel injectors
http://injectordynamics.com
Injen
Aftermarket intakes, exhaust systems, intercoolers etc
http://injen.com/
Innovate Motorsports
Advanced engine sensors and gauges
http://www.innovatemotorsports.com/
Innovative Mounts
Mounts and brackets
http://innovativemounts.com
Invidia Exhausts
High performance exhaust sytems
http://www.invidia-exhausts.com.au/
Iron Cross
American made bumpers and guards
http://www.ironcrossautomotive.com/
ISC Suspension
Aftermarket adjustable automotive supension components, coilovers, suspension arms etc
http://iscsuspension-na.com/
ITG Air Filters
High performance air filters
http://www.itgairfilters.com/
Jaz
Drag racing products and fuel cells
http://www.jazproducts.com/
JE Pistons
Forged pistons
http://www.jepistons.com/
JLT
US cold air intakes
http://www.jlttruecoldair.com/
JR Filters
Filters and suspension components
http://www.jrfilters.com/
K&N Engineering
Perofrmance air and oil filters
http://www.knfilters.com/
K1 Technologies
Performance crankshafts and connecting rods
http://www.k1technologies.com/
Kaaz
Aftermarket performance limited slip differentials
http://www.kaaz.co.jp/
Kartboy
Shifters and accesories
http://www.kartboy.com/
KC HiLiTES
Off-road lights
http://www.kchilites.com/
Kelford Cams
Performance camshafts and valve train products
http://www.kelfordcams.com/
Killer B Motorsport
Oil system products, exhaust headers
http://www.killerbmotorsport.net/
King Engine Bearings
Engine bearings
http://www.kingbearings.com/
King Shocks
Off-road racing shocks
http://www.kingshocks.com
KMC Wheels
Off-road wheels for UTVs
http://www.kmcwheels.com/
KONI
Adjustable shock absorbers
http://www.koni.com
Kooks Headers
Exhaust headers and other components
http://kooksheaders.com/
Koyo Radiators
OE level radiators
http://www.koyorad.com/
KraftWerks
Supercharging systems
http://kraftwerksusa.com/
Kumho
Tires
http://kumhotyre.co.uk
KW
Aftermarket coilovers and other dampers
http://www.kwsuspensions.net/
KYB
Aftermarket shock absorbers
http://kyb-europe.com/
Lazer
Extra lights
http://www.lazerlamps.com/
Liqui Moly
Oils and additives
http://www.liqui-moly.com/
LP Aventure
Off-road bumper guards, lift kits, skid plates on other parts for Subarus
http://lpaventure.com/
LUND
Ford Mustang performance parts - injectors, sensors, turbos
http://www.lundracing.com/
Magnaflow
World famous exhaust systems and parts
http://www.magnaflow.com/
Magnecor Ignition Parts
Performance ignition leads and spark plugs
http://www.magnecor.co.uk/
Mahle
Engine components
http://www.mahle.com
Mandrus
Aftermarket wheels for Mercedes-Benz
http://www.mandruswheels.com/
Manley Performance
Aftermarket engine components
http://www.manleyperformance.com/master_catalog.shtml
Marchesini
Motorcycle forged wheels
http://www.marchesiniwheels.com/
Maxtrac
Suspension components, arms, shocks, coils etc
http://maxtracsuspension.com/
MBRP
Aftermarket exhaust components
http://www.mbrp.com/
McGard
Anti-theft wheel nuts
http://mcgard.com/
McLeod Racing
Drag and competiton driveline parts - clutches, flywheels etc
http://www.mcleodracing.com/
Method Wheels
Off-road wheels
http://www.methodracewheels.com/
MGP Connecting Rods
Very high end aluminium connecting rods for dragsters
http://mgpconnectingrods.com/
Michelin
Tyres, for road and motorsport
http://www.michelin.com/
Mickey Thompson
Special tires - off-road, street and drag
http://www.mickeythompsontires.com/
Milltek Sport
Exhaust systems
http://www.millteksport.com/
Mintex pads
Brake system components
http://mintex.com/
Mishimoto
Aftermarket cooling radiators
http://www.mishimoto.eu/
Mitsubishi OE
Mitsubishi OE parts
http://www.mitsubishi-motors.com/
Mongoose Exhausts
Aftermarket exhaust, mostly for Fords
http://www.mongooseexhausts.com/
Monit
Trip systems for rally cars
http://www.monitrally.com/
Motegi Racing
Aftermarket wheels
http://www.motegiracing.com
Moto Metal
Aftermarket wheels
http://www.motometalwheels.com/
Moton
Aftermarket coilovers
http://motonsuspensionusa.com/
Motul
Lubricants
http://www.motul.com/
Mountune
Ford tuning and performance parts
http://www.mountuneusa.com/
MSA Wheels
Off-road wheels and tyres
http://msawheels.com/
MXP Mackin Extreme Products
Aftermarket exhaust system components
http://www.facebook.com/mxpperformance/
N-Fab
Off-road steps, mounts and bumpers
http://n-fab.com/
Nankang Tires
Tyres
http://www.nankang-tyre.com/
NGK
Spark plugs, coils and wire sets, oxygen sensors
http://ngksparkplugs.com/
Niche Road Wheels
Aftermarket wheels
http://www.nicheroadwheels.com/
Nismo
Nissan motorsport and performance parts and cars
http://www.nismo.co.jp/
Nissan OE
Nissan OEM parts
http://www.nissan-global.com/
Nitrous Express
Nitrous oxide kits
http://www.nitrousexpress.com/
Nolathane Bushes
Polyurethane bushes
http://www.nolathane.com.au/
OBP
Brake parts, tanks and other accessories
http://www.obpltd.com/
Öhlins
Öhlins Racing AB is the manufacturer of some of the world's finest suspension compnents.
Öhlins Road&Track - street and trackday coilovers featuring DFV (Dual Flow Valve).
Advanced Trackday - more circuit focused suspension, utlizing TTX-technology.
Adventure - off-road or rally-raid in mind? This is the rough terrain/off road suspension you have been looking for.
Motorsport - custom tailored racing suspension for your individual needs.
We are also Öhlins factory authorized service center, capable of servicing or rebuilding any suspension component.
http://www.ohlins.com/
Oliver
Connecting rods and bolts
http://oliverracingparts.com/
OMP
Racing safety equipment
http://www.ompracing.com/
OS Giken
Clutches, LSDs, gears and other transmission parts
http://osgikenusa.com/
Pace Edwards
Truck bed covers
http://www.pace-edwards.com/
Pacenote
Pacenote books
http://pacenote.com
Pagid pads
Performance brake pads
http://www.pagidracing.com/
PBS Pads
Performance brake pads
http://pbs-brakes.com/
Pedal Commander
Gas pedal behaviour tuning chips
http://pedalcommander.com/
Pedders
Performance suspension and brakes components
http://pedders.com/
Performance Friction Brakes
Brake pads and calipers
http://pfcbrakes.com/
Perrin Performance
Performance parts and car customization products for Subaru, Nissan, Honda and Toyota
http://www.perrin.com/
PIAA
Extra lights
http://www.piaa.com/
Piper cams
Performance camshafts
http://www.pipercams.co.uk/
Pipercross Filters
Air filters and intakes
http://www.thepipercrossshop.co.uk/
Pirelli
Motorsport and street tires
http://www.pirelli.com/
Polybush
Polyurethane suspension bushes and components
http://www.polybush.co.uk/
Powerflex Bushes
Polyurethane suspension bushes and mounts
http://www.powerflex.co.uk/
PowerStop
Brake parts
http://www.powerstop.com/
Progress Technology
Honda suspension
http://www.progressauto.com/
Project Kics
Wheel nuts and hub rings
http://www.kyoei-ind.co.jp/sangyo/
Project Mu
Performance brakes
http://www.project-mu.co.jp/
ProTEKt
Front bumper protection skid slates
http://www.protektskidplates.com/
Prothane
Bushings and mounts
http://prothane.com/
Putco
Chrome trim, LED lights, step bars and other accessories
http://www.putco.com/
Quick Time Performance
Exhaust systems and electric exhaust cutouts
http://quicktimeperformance.com/
Quaife
High performance differentials
http://www.quaife.co.uk/
Race Star
Drag racing wheels
http://racestarindustries.com/
RaceChip
Engine ECU optimization
http://www.racechip.com/
Raceequip
Racing safety equipment
http://www.racequip.com/
Raceseng
High performance street and track car products
http://raceseng.com/
Radium Engineering
Catch cans and other performance parts
http://www.radiumauto.com/
Rally Armor
Rally mudflaps
http://www.rallyarmor.com/
Rampage
Civic Type-R and Nissan GT-R titanium parts
http://rampagefab.com/
Rays
Forged wheels from Japan
http://www.rayswheels.co.jp/
RBP
Wheels and lift kits
http://www.rollingbigpower.com/
ReadyLIFT
Lift kits and suspension systems
http://www.readylift.com/
Recaro
High end racing seats
http://www.recaro-automotive.com/
Red Line
Synthetic lubricants made in California
http://www.redlineoil.com/
Redbourne
Land Rover wheels
http://www.redbournewheels.com/
Remark
Hand welded exhausts
http://www.remark-usa.com
Retrax
Retractable tonneau or truck bed covers
http://retrax.com/
Revel
Lift kits and suspension systems
http://www.revelperformance.com/
Rigid Industries
Lightbars
http://www.rigidindustries.com/
Road Armor
Bumpers for offroad vehicles
http://roadarmor.com/
Roll-N-Lock
Truck bed covers
http://rollnlock.com/
Ronal
Aftermarket wheels
http://www.ronal-wheels.com/
Rotiform
World famous aftermarket wheels
http://www.rotiform.com
Roush
High performance parts for Ford vehicles
http://www.roushperformance.com/
RS-R
Coilovers and springs
http://www.rs-r.com/
RTS Clutch
Brake and clutch parts
http://www.rtsperformance.co.uk/
Rugged Ridge
Jeep aftermarket parts
http://ruggedridge.com/
Russell
Hoses and fittings
http://www.russellperformance.com/
Rywire
Motorsport electronics
http://www.rywire.com/
Sabelt
Motorsport equipment, harnesses
http://www.sabelt.com/
Sachs Clutch
Clutches and suspension kits
http://www.sachsperformance.com/
Sadev
Motorsport racing transmissions
http://www.sadev-tm.com/
Samco
Silicon hoses
http://samcosport.com/
Shrader
Rear seat delete parts
http://www.shraderperformance.com/
Schrick
Performance camshafts, valves and everything inbetween
http://www.schrick.com
Schroth
Racing harnesses and HANS devices
http://www.schroth.com/
Scorpion Exhaust
Handcrafted performance exhausts
http://www.scorpion-exhausts.com/
SCT Performance
Ford, GM and Dodge ECU tuning
http://www.sctflash.com/
Seibon
Carbon fiber body components
http://seiboncarbon.com/
SFS Performance Hoses
Silicon hoses
http://www.sfsperformance.co.uk/
Simons
Sports exhaust systems
http://simons.se/
Simpson
Helmets, racing suits and harnesses
http://www.simpsonraceproducts.com/
Sinister Diesel
Diesel performance parts and products
http://sinisterdiesel.com/
Skunk2 Racing
Honda performance parts
http://www.skunk2.com/
Skyjacker
Lift kits and suspension systems
http://skyjacker.com/
SLP Street Legal Performance
Late model muscle car performance parts
http://www.slponline.com/
Snow Performance
Boost cooler kits and water injection
http://www.snowperformance.eu/
South Bend Clutch
Clutches and flywheels
http://www.southbendclutch.com/
SPAL
Electric cooling fans
http://www.spalusa.com/
Sparco
Racing seats, helmets, overalls and much more
http://www.sparco-official.com/
SPC Performance
Alignment kits and components
http://www.spcalignment.com
SPEC
Clutches and flywheels
http://specclutch.com/
Spectre Performance
Air filters and intakes
http://www.spectreperformance.com/
Speedline Wheels
Rally, racing and street wheels
http://www.speedlinecorse.net/
SPYDER
Manufacturer of aftermarket lights
http://www.spyderauto.com/
SSR
Quality lightweight Japanese wheels
http://www.ssr-wheels.com
ST Suspensions
Coilover suspension by KW
http://www.st-suspensions.net/
Stainless Bros
Stainless steel fabrication products
http://www.stainlessbros.com/
Stainless Works
Exhausts made in USA
http://stainlessworks.net/
Stampede
Pickup truck accessories
http://www.stampedeproducts.com/
Status Alloy Wheels
Aftermarket wheels in 20-26" sizes
http://www.statuswheels.com/
Steinbauer Performance
Electronics components for electric and internal combustion engines
http://www.steinbauer.cc/
Stilo
Highest quality helmets
http://www.stilo.it/
Stoptech
World class brake components
http://centricparts.com/brands/centric-parts/stoptech
Subaru OE
Subaru OEM parts
http://www.subaru.com/
Superlift
Lift kits and suspension systems
http://superlift.com/
Superpro Bushes
Bushings for most cars
http://www.superproeurope.com/
Supertech Performance
Engine internals
http://www.supertechperformance.com/
Superwinch
4x4 winches
http://superwinch.global/
Suvi Performance
Pedal boxes, hydraulic handbrakes and shifters
http://www.suviperformance.com/
Takata Racing
Racing harnesses
http://www.takataracing.com/
Tanabe
Japanese coilovers and exhausts
http://www.tanabe-usa.com/
Tein
Coilover suspension
http://www.tein.co.jp/
Terratrip
Rally tripmeters, headsets and intercoms
http://terratrip.com/
Ticon
Titanium exhaust components
http://www.ticonindustries.com/
Tillet
Lightweight racing seats
http://www.tillett.co.uk/
Tomei
High quality engine internals & exhausts
http://www.tomei-p.co.jp/
Tonno Pro
Truck bed covers
http://www.tonnopro.com/
Torque Solution
Manufacturer of automotive aftermarket accessories like bushes, hoses, fittings
http://www.torquesolution.com/
Total Seals
Piston rings for every engine
http://www.totalseal.com/
Trend Performance
High quality pushrods, rocker arms, valves etc
http://trendperform.com/
TRS Motorsport Equipment
Motorsport harnesses
http://www.trs-motorsport.com/
Truxedo
Truck bed covers & accessories
http://truxedo.com/
TSW
Aftermarket wheels
http://www.tsw.com/
TTV Racing
Flywheels and clutches
http://ttvracing.com/
Turbo XS
Blow off valves, their parts, boost controllers and many more performance parts
http://turboxs.com
Turbosmart
High-performance competitive turbo accessories
http://www.turbosmart.com/
U.S. MAGS
Wheels for classic muscle cars and hot rods
http://us-mags.com/
Vektor Performance
Porsche aftermarket parts made in USA
http://www.vektorperformance.com/
Vibra Technics
Race engineered engine and suspension mounts
http://www.vibra-technics.co.uk/
Victor Equipment
Porsche aftermarket wheels
http://www.victorequipmentwheels.com/
Victor Reinz
World's leading manufacturer of all types of seals
http://www.victorreinz.com/
Volant
Closed box and other intakes and exhausts for offroading
http://volant.com/
Volk Racing
Legendary forged wheels from Japan
http://www.rayswheels.co.jp/products/brand_detail.php?lang=en&brand=VOLK
Vorsteiner
Wheels and carbon fiber options/parts
http://vorsteiner.com/
Wagner Tuning
Custom intercoolers, intakes etc
http://www.wagner-tuning.com/
Walbro
High performance fuel pumps
http://walbrofuelpumps.com/
Wavetrac
High-end American made differentials for a wide variety of applications
http://www.wavetrac.net/
Weapon R
Performance intake, exhaust and chassis components
http://weapon-r.com/
WeatherTech
American made high quality floor mats. Famous for its FloorLiner series of mats, that are laser measured for a perfect fit for each car.
http://www.weathertech.com/
Wehrli Custom Fabrication Inc
Performance parts for Duramax, Cummins and Power Stroke engines
http://www.wcfab.com/
Weld
American drag racing, off-road and street wheel manufacturer
http://www.weldwheels.com/
Westin
Off-road parts like winches, bumpers and hitch steps for trucks and pickups
http://www.westinautomotive.com/
Whiteline Suspension
High quality suspension components and bushes
http://whitelineperformance.com/
Wilwood
American manufacturer of high performance brake components
http://www.wilwood.com/
Winmax Brake Pads
High performance brake pads for trackday and race use
http://www.winmaxeurope.com/
Wiseco
High performance engine internals such as forged pistons, con-rods, crankshafts, etc
http://www.wiseco.com/
WORK Wheels
Forged lightweight, yet strong wheels from Japan. WORK are making some of the most legendary JDM wheels ever since 1977. 3-piece rims like Work Meister (S1, L1, M1), Work Emotion series, Equip or M.C.O. Racing heavy duty rally wheels. All WORK wheels are made to order, so can be customized in a multitude of ways, including, but not limited to, custom lip finishes, candy colours and anodizing.
http://www.work-wheels.co.jp/
Wössner
High performance pistons and con-rods
http://www.woessner-kolben.de/
XD
Wheels for off-road vehicles, pickups and SUVs
http://www.xdwheels.com
Yokohama
Race and performance tyres for circuit, rally, track and road.
http://www.yokohama-online.com/Motorsports
Yukon Gear & Axle
Differential parts for American cars
http://www.yukongear.com/
Zbroz
UTV suspension components
http://www.zbrozracing.com/
Zeronoise
Racing communications and intercoms
http://zeronoisedevices.com/
ZEX
Nitrous oxide systems and components
http://www.zex.com/
ZRP Rods
Forged and billet engine internals
http://www.zrp-rods.com/
