Ontronic Engine Management Systems
- Manufacturer of programmable electronic engine management systems for racing applications. Includes specifications, manuals and software. [English, German, French]
- http://www.ontronic.com

TunedAuto.com
- Retailer of automotive body kits, racing seats and rear spoilers. Includes product catalogue and company profile.
- http://www.tunedauto.com

Pace Performance Parts
- Offers factory crate engines, transmissions, performance products and books. Includes technical specifications and product catalogue.
- http://www.paceperformance.com

4Filters
- Offers intake systems, air and oil filters for most makes and models. Includes product catalogue.
- http://www.4filters.com/

NFC Performance
- Offers parts and accessories including tuning kits and wheels.
- http://www.nfcperformance.com

PerformancePartz
- Offers a variety of upgrade parts and accessories. Includes product database and company profile.
- http://www.performancepartz.com

Phethean Racing Products
- Specializes in speed equipment. Includes product catalog and company profile.
- http://www.offyparts.com/

GlowShift Gauges
- Offers racing gauges in several color and tinted. Includes product catalog.
- http://www.glowshiftdirect.com

Panhandle Performance
- Offers machining and dynamometer services, as well as parts and accessories. Includes product catalog and company profile.
- http://www.panhandleperformance.com/

Lotgrace Trading
- Offers chip tuning equipment for diesel engines. Includes product database and company profile.
- http://www.lotgracetrading.co.uk

Turbo Wholesale Distribution
- Distributor of turbo parts and related systems. Includes product catalog.
- http://www.turbowholesale.com/

Engine Runup
- Manufacturer of water and alcohol injection systems. Includes technical data and product overview.
- http://www.enginerunup.com

Speed Engineering
- Offers a range of parts and accessories for muscle cars and trucks. Includes product catalog and company profile.
- http://www.speed-eng.com

Ross Machine Racing
- Offers engine air intake and fuel delivery systems. Includes product catalog, gallery and project overview.
- http://www.rossmachineracing.com

Italian Tuning
- Offers a variety of parts and equipment for street and racing applications. Includes product catalog. [English, Italian]
- http://www.ricambituning.it/

Overspeed Motorsports
- Offers a variety of components and accessories for street and racing applications. Includes product catalog and company profile.
- http://www.overspeedmotorsports.com

R-S MotorSports
- Seller of engine components as well as complete street and race engines. Includes product catalog.
- http://www.r-smotorsports.net

Straightline Performance
- Offers engine parts and accessories, as well as flow bench work, machining and related services. Includes product catalog and company profile.
- http://www.straightline-perf.com

Wake Performance
- Offers parts and accessories for a variety of cars. Includes product catalog and company profile.
- http://www.wakeperformance.com/

ModYourCar
- Offers parts and accessories for car modifiers. Includes product catalog and company profile.
- http://www.modyourcar.com.au

Performance Diesel
- Offers diesel parts and related upgrade systems. Includes product catalog and company profile.
- http://www.performancedieselinc.com

Silicone Intake Systems
- Offers intercoolers and piping systems for turbo cars. Includes product catalog and company profile.
- http://www.siliconeintakes.com

Amber Performance
- Offers car parts and accessories for tuning. Includes product catalog and company profile.
- http://www.amber-performance.co.uk

Horsepower Upgrades
- Offers upgrade systems for diesel and gas engines. Includes product catalog.
- http://www.horsepowerupgrades.com

Go Fast Bits
- Manufacturer of aftermarket parts for supercharged engines. Includes product catalog and company profile.
- http://www.gofastbits.com/

Performance Curve
- Reseller of car parts and accessories. Includes product catalog and company profile.
- http://www.performance-curve.com/

Cool Blue Performance
- Offers Mustang and truck parts including superchargers, nitrous kits and suspension. Includes product catalog.
- http://www.coolblueperformance.com

Import Performance Shop (IPS)
- Offers parts and accessories for import tuners. Includes product catalog and company profile.
- http://www.importperformanceshop.com

Airaid Sales
- Offers air intake systems, spacers, tubes and filters. Includes product overview and company profile.
- http://www.airaidsales.com

STchiptuning
- Supplier of tuning systems for car and truck. Includes service overview and chip database.
- http://www.stchiptuning.com

Discount Power Parts
- Offers parts and accessories for gas and diesel vehicles. Includes product catalog.
- http://www.discountpowerparts.com

Vortex Valve
- Device designed to improve air flow intake to the engine. Includes technical data and emission reports.
- http://www.vortexvalve.com

EPS Turbos
- Offers parts from turbo kits and blow off valves to engine internals and electronics. Includes product catalog and company profile.
- http://www.epsturbos.com/

Evil Performance
- Retailer of performance car parts and accessories. Includes product catalog.
- http://www.evilperformance.co.uk

OptionImports
- Retailer of performance parts for aftermarket needs. Includes product catalog and company profile.
- http://www.optionimports.com

Spooled Motorsports
- Specializes in turbochargers for factory and performance applications. Includes product catalog.
- http://www.spooledmotorsports.com

Performance Centre
- Retailer of performance products. Includes company profile and product catalogue.
- http://www.performancecentre.co.uk

Cekret Performance
- Specializes in performance auto parts and accessories. Includes company profile and product catalogue.
- http://www.cekretperformance.com

Treadstone Performance
- Retailer of induction and heat exchanger products. Includes product catalog.
- http://www.treadstoneperformance.com/

New Level Motorsports
- Retailer of performance parts and accessories. Includes product catalog.
- http://www.newlevelmotorsports.com

Edo Performance
- Retailer of performance parts and related instrumentation. Includes product catalog.
- http://www.edoperformance.com

USDieselChips.com
- Offers power performance chips for diesel pickup engines, air intake systems and fuel additives. Includes installation instructions, technical data, testimonies and FAQs.
- http://www.usdieselchips.com

Hawkins Speed Shop
- Retailer of performance racing parts and related accessories. Includes product catalog.
- http://www.hawkinsspeedshop.com/

National Performance Parts Warehouse
- Specializes in aftermarket performance parts for a large selection of vehicles. Includes product catalog and company profile.
- http://www.nppw.com

SuperchargersOnline.com
- Retailer of superchargers and related accessories for all major brands. Includes news, technical data and product catalog.
- http://www.superchargersonline.com/

Forge Motorsport
- Offers alloy tuning components for chassis and engines. Includes dealer list and product catalogue.
- http://www.forgemotorsport.com

SpecTuning
- Offers performance car parts. Includes product catalogue.
- http://www.spectuning.com

Volant Air Intakes
- Offers air intake systems for a wide variety of cars, trucks and SUV. Includes product overview and dealer list.
- http://www.volantperformance.com

Nippon Power
- Offers performance accessories for the sport compact market. Includes product catalogue.
- http://www.nipponpower.com

Midlands Nitrous
- Manufacturer of nitrous oxide systems for cars and bikes. Includes product overview.
- http://www.midlandsnitrous.co.uk/

Lethal Performance
- Offers aftermarket parts and accessories for muscle cars. Includes product overview and company profile.
- http://www.lethalperformance.com

Eng-Tek
- Offers tuning modules for diesel engines, exhaust systems and related accessories. Includes product catalogue.
- http://www.eng-tek.com.au

Auto Parts Express (APE)
- Supplier of replacement and performance carburetors. Includes product overview.
- http://www.theape.com

BHP Plus
- Offers tuning systems and intake filters for diesel engines. Includes product overview and company profile.
- http://www.bhpplus.co.uk

Pole Position USA
- Distributor of motorsport parts and racing equipment. Includes product overview.
- http://www.polepositionusa.com

PerformanceParts.com
- Supplier of performance automotive parts for foreign and domestic cars. Includes part search by keyword, catalogue and company profile.
- http://performanceparts.com/

Rapid Motorsports
- Supplier of products for race applications and street performance. Includes product catalogue and company profile.
- http://www.rapidmotorsports.com

Eracingzone
- Offers altezza light, intake and exhaust systems, spoilers and related components. Includes product catalogue.
- http://www.eracingzone.com

Green Filter
- Manufacturer and supplier of cotton air filters for racing applications. Includes product catalogue and company profile.
- http://www.greenfilterusa.com

TnT Performance and Repair
- Specializes in diesel engine diagnostic systems and performance components. Includes product catalogue and company profile.
- http://www.engineperformancecenter.com/

Wilson Manifolds
- Manufacturer of performance parts and kits, with focus on nitrous injection systems. Includes product overview, company profile and catalogue.
- http://www.wilsonmanifolds.com

Competition Products
- Offers parts and accessories for engine builders and car enthusiasts. Includes product overview and company profile.
- http://www.competitionproducts.com/

Race Car Supply
- Provides products, services, and information on Formula Vee and Pro Formula Vee racing. Includes contact information and related links.
- http://www.sracing.com/

Think Automotive Ltd.
- UK manufacturer of Mocal oil coolers and components. Laminova water to oil coolers. Remote filter heads that enable relocation of the oil filter. Transmission oil coolers.
- http://www.thinkauto.com/

Spyder Engineering
- Lotus compatible parts.
- http://www.spydercars.co.uk/

Randercar Race Car Manufacturers
- Manufacturer of race car chassis, parts and supplies.
- http://www.pngusa.net/~randercar/

Nitrous Direct
- Offers a line of nitrous oxide kits, supplies and parts. Includes detailed technical information and a FAQ.
- http://www.nitrousdirect.com/

MRT Direct
- Specializing in aftermarket performance parts, exhuast, suspension and appearance accessories. Includes product overview.
- http://www.mrt-direct.com/

Top Gear
- Sells a variety if accessories, snow chains, computer and tuning tools, and air horns.
- http://www.topgear-sales.co.uk/

Martel Brothers
- Offers a wide range of products for engine and chassis. Includes product catalogue.
- http://www.martelbrothers.com/

Rebco Performance Products
- Specializing in electronic wheel scale systems, dashboard instrumentation, chassis setup, and pit equipment. Includes tech tips and classifieds.
- http://www.rebcoperformance.com

RR-Racing
- Performance parts and accessories for Ford Probe GT, Mazda MX6, MX3, and 626.
- http://www.rr-racing.com/

Tokyo Express
- Provide performance and tuning parts for Honda, Mitsubishi, Subaru, Nissan, Mazda, and Toyota.
- http://www.tokyo-express.co.uk/

Shogun Industries
- Manufacturer of cooling and electrical components for drag racing cars. Includes technical information of products and company profile.
- http://shogunindustries.com/

SD Concept Engineering, Inc.
- Centrifugal supercharger kits and intercoolers. Technical information and system prices online.
- http://www.sd-concepts.com/

Wizard of NOS
- Nitrous oxide injection systems. Make own products and specialise in performance modifications.
- http://www.noswizard.com/

West Covina Toyota Sport
- Vehicle-specific online shopping for TRD and Toyota parts. Full online catalog.
- http://www.wctoyotasport.com/

V8 Conversions
- Specializing in Rover V8 conversions for MGB roadster and GT models. Kits, engine and chassis parts, and accessories.
- http://www.mgcars.org.uk/v8conv/v8convs.html

Shark Racing
- Supplier of aftermarket parts for Korean and Japanese cars from strut bars to body kits and spoilers. Includes product overview.
- http://www.sharkracing.com

Schatz Motorsport
- Schatz Motorsport carries performance parts and accessories, racing apparel, and unique gift items for the Porsche enthusiast.
- http://www.schatzmotorsport.com

Performance International
- Offers parts and accessories for cars, trucks, and motorcycles.
- http://www.performanceintl.com

OnTrack Digital
- Offers vehicle performance testing tools and software. Includes technical data and product overview.
- http://www.ontrackdigital.com/

Forced Performance
- Offers custom turbochargers for racing applications. Includes product overview and company profile.
- http://www.forcedperformance.net

Car Shop
- Offers parts and accessories for racing, street rod and other specialized applications from major manufacturers.
- http://www.carshopinc.com/

TurboXS
- Offers blowoff valves, boost controllers and related equipment for turbocharged engines. Includes product overview and company profile.
- http://www.turboxs.com

4x4 Tuff
- Offers parts and accessories including engines, rails and chassis.
- http://www.4x4tuff.com

Overseas Auto
- Performance parts and accessories for import and domestic sports cars, trucks, SUV's. Warehouses in both the U.S. and Canada.
- http://www.overseas-auto.com/

Sube Sports
- Driving suits, gloves, shoes, pit crew accessories, seats, harnesses, safety equipment, PIAA lights and light accessories plus more products for racers.
- http://www.subesports.com/

Weymouth Pin Manufacturing, Ltd.
- UK manufacturer of high performance piston pins for petrol and diesel engine applications. High performance applications including Indy, Formula One and BTCC, mid range diesels and medium speed engines.
- http://www.weypin.co.uk/

Total Seal Piston Rings
- Manufacturer of piston rings for racing and street engines. Total Seal Engine Development Center produces custom engines for street, racing and marine uses.
- http://www.totalseal.com/

Ross Racing Pistons
- Manufacturer of stock and custom pistons. Different types of racing require different piston designs. Custom pistons are made to the customer's specifications.
- http://www.rosspistons.com/

Unique Aluminum Products
- Manufacturer of computer designed, light weight, aluminum sheet metal valve covers for many facets of motorsports.
- http://www.uniquealuminumproducts.com/

Perma-Cool
- Manufacturer of automotive oil coolers, electric and mechanical cooling fans and components, fan clutches, oil and fuel filtering systems, oil filter adapters, and remote filter brackets.
- http://www.perma-cool.com/

The Winner's Circle
- Distributor of Austin Healey Sprite and MG Midget restoration and competition parts. Classified ads.
- http://www.spridget.com/

Need For Speed
- Offers a range of aftermarket performance car parts. Includes product catalogue.
- http://www.needforspeed.co.uk/

Nology Engineering
- Manufacturer of ignition systems and related components for street and emission sensitive applications. Includes product catalogue.
- http://www.nology.com

Speedometer Shop
- Wholesale and retail instrument sales and repair. Conversion and restoration for street rods, muscle cars, classic cars, import cars, racers, and trucks.
- http://www.speedometershop.com/

PowerMist Racing Fuels
- Manufacturer of racing fuels, methanols, lubricants, and performance additives.
- http://www.powermist.com/

Split Second
- Manufactures instrumentation and calibration products. Split Second products are widely used to add turbos and superchargers to naturally aspirated engines.
- http://www.splitsec.com/

Pankl Racing Systems
- Manufacturer of engine components and drivetrain systems. Materials used are aluminium, titanium, MMC and carbon composite as well as magnesium and ultra high strength steel.
- http://www.pankl.com/

Pennon Composites
- Specialist manufacturer of composite components for the motorsports industry. Carbon fiber, Kevlar and fiberglass parts.
- http://www.pennon.com/

Road Race Engineering
- Performance automotive aftermarket services and accessories. Complete fabrication services for roadracing, autocross, pro rally and high performance street applications. Specialists in Mazda 323 and Mitsubishi.
- http://www.roadraceengineering.com/

Pro-Gram Engineering Corp
- Manufacturer of race engine speciality parts. Steel billet main caps, main cap support straps and stud kits. Rear main oil seals, and carburetor spacers.
- http://www.pro-gram.com/

Truppi-Kling High Performance
- Competition engine builder. Racing engines and performance parts for NHRA, Dirt and Outlaw.
- http://www.truppi-kling.com/

Racing Performance Works
- Australian company specialising in the production of high performance Mitsubishi, Hyundai and Chrysler motors to suit street, drag, four wheel driving and rallying.
- http://www.rpw.com.au/

RaZor Performance Products
- Manufacturer of dry sump oiling systems.
- http://www.razorperformance.com/

Melling
- Manufacturer of oil pumps, kits and components. Includes product catalogue, technical information and tips.
- http://www.melling.com/

Hypertech
- Offers tuning modules, chips, pulleys and related equipment for most vehicles.
- http://www.hypertech-inc.com

West Coast Differentials
- Ring and pinion gears, lockers and axle parts. Rear end and differential parts for 4 wheel, off road or performance vehicles.
- http://www.differentials.com/

Steeda Autosports
- Airfilter systems, exhaust systems, superchargers, suspension, and rims for most Ford vehicles.
- http://www.steeda.com

U.S. Radiator
- Manufacturer of radiators for the restoration and high performance marketplace. Specializing in reproduction radiators for the muscle car era; also street rods and customs. Distributors of SPAL electric cooling fans.
- http://www.usradiator.com/

Unorthodox Racing, Inc.
- Manufacturer of performance parts for imports and domestics including underdrive pulleys, adjustable cam sprockets, aluminum flywheels, HD Kevlar clutches and phenolic spacers. Price list online.
- http://www.unorthodoxracing.com/

RAM Clutches
- Manufacturer of performance clutch systems. Flywheels, pressure plates and clutch disks.
- http://www.ramclutches.com/

RPS Performance Products
- Manufacturer of high performance clutches and clutch systems for street and racing vehicles. Technical information and articles online.
- http://www.turboclutch.com/

Wilson Competition
- Manufacturer of Builtwiser sprint cars and components. Also manufactures Wilson competition carburetors and parts. Products lists with prices online.
- http://www.wilsoncompetition.com/

Tootees Drag Racing Chassis
- Computer aided design and manufacturing of drag racing, fuel and funny car chassis and components. Photos of completed cars and products offered. Classified ads.
- http://www.tootees.com/

R J Race Cars
- Custom builder of prostock and promod chassis. Also carries a complete line of chassis components. Photos and prices online. Price list of used parts.
- http://www.rjracecars.com/

Winters Performance Products
- Manufacturer of high performance auto parts including rear ends, hubs, differentials, axles, transmissions, shifters and gears.
- http://www.wintersperformance.com/

Longacre Racing Products
- Manufacturer of racing related products. Includes product catalogue and company profile.
- http://www.longacreracing.com/

Moroso Products
- Manufacturer and supplier of automotive equipment for racing and street applications.
- http://www.moroso.com/

Turbo City
- Turbochargers, electronic fuel injection, TBI performance accessories for Jeep, Chevy, and Volkswagen.
- http://www.turbocity.com

Speedway Engineering
- Manufactures quick-change rear ends, full floating rear ends based on 9" Ford SVO housings, anti-sway bars, front hubs, drive flanges, axles and other parts. Photo catalog online.
- http://www.1speedway.com/

Paragon Performance
- High performance automotive stainless steel braided hose, aluminum adapters and fittings plus hose assemblies lined with Teflon. Technical information and prices online.
- http://www.paragonperformance.com/

Schneider Racing Cams
- Manufacturer of camshafts and valve train components. Custom grinds from mild to wild.
- http://www.schneidercams.com/

Reed Cams Inc.
- Engineers and designs line of camshafts, components, and carburetors. Custom cam designs, coordinated valve train components and flow-balanced carburetor modifications.
- http://www.reedcams.com/

Pro-Max Performance
- Specialists in exhaust, from stock replacement to total performance for imports, domestic, RV's and race cars. Also radiators and brakes. Technical data and photos online for many manufacturers represented.
- http://www.pro-max.com/

Magnecor Race Wires
- Manufacturer of spark plug wires, ignition cables and ignition leads for street and race applications. Includes technical information.
- http://www.magnecor.com/

Lone Star Performance
- Offers a wide range of performance products. Includes catalogue and company profile.
- http://www.lonestarperformance.com/

Trick Flow
- Manufacturer of high performance cylinder heads, camshafts, pistons and intake manifolds. Technical data and installation instructions online.
- http://www.trickflow.com/

Century Performance Center
- Offers automotive products and accessories. Includes product catalogue, bulletin board and technical articles.
- http://www.centuryperformance.com/

Ryan Falconer Racing Engines, Inc.
- Racing engines for every form of auto racing from off-road trucks, to high endurance Rally cars, to sports car racing. Also for marine and aircraft applications. Shop talk forum.
- http://www.falconerengines.com/

Pro-Systems
- Builds and modifies carburetors. Also conversion to alcohol. NASCAR approved race carburetors plus circle, track, drag and street. Fuel pumps, regulators and logs.
- http://www.pro-system.com/

ProShocks
- Shocks for racing and street rods. Technical information online including calculators. Secure catalog with photos. Sponsorship schedules.
- http://www.proshocks.com/

Precision Performance Products
- Automatic racing shifters and race car accessories. Manufactures Power Shift and Kwik Shift brands. Photos and prices of product line. Technical information offered online.
- http://www.precisionperformance.com/

Powertech
- Porsche heavy duty turbo sump pumps, crankshaft double pulleys for street or track use and aluminum clutch conversion packages. High performance engines, transmissions, brakes and suspension. Roll bars and cages.
- http://www.pwr-tech.com/

Performance Suspension Technology
- High technology suspension components and replacement parts.
- http://www.p-s-t.com/

Weber Carburetors
- Distributor of carburetors, conversion kits and fuel systems. Includes catalogue and pricing.
- http://www.webercarburetors.com/

Outlaw Performance
- Manufacturer of chassis and fiberglass bodies, street rod accessories, parts, bodies suspension components, and gas tanks.
- http://www.outlawrods.com/

Marren
- Offers fuel injection parts and equipment for racing and aftermarket applications. Includes product catalog and company profile.
- http://www.injector.com/

Performance Tuning
- Performance and aftermarket auto parts.
- http://www.ptuning.com/

Quarter Master Racing Clutches
- Clutches and drive line products for circle, track and road racing. Catalog and installation instructions are available online.
- http://www.racingclutches.com/

Lingenfelter
- Designs and sells performance automotive and marine engines and components. Includes product catalogue.
- http://www.lingenfelter.com/

LG Motorsports
- Offers tuning equipment, suspension components and cold air induction systems. Includes technical tips and product catalog.
- http://www.lgmotorsports.com/

HKS Performance Products
- Offers engine, suspension and drivetrain components. Includes company profile and product catalogue.
- http://www.hksusa.com/

White Racing and Marine
- Offering plug and play electronic fuel injection kits for most car models from 1985 to 2002, as well as tuning systems.
- http://whiteracing.com

Jet Performance Products
- Offers fuel and electronic systems, power chips and transmissions. Includes product catalogue.
- http://www.jetchip.com/

Sallee Chevrolet
- GM performance parts, aftermarket parts and engines. Price lists, customer photos, discussion board and chat.
- http://www.sallee-chevrolet.com/

Turner Motorsport
- Specialist in high performance BMW accessories. Online catalog with photos and prices.
- http://www.turnermotorsport.com/

Precision Industries
- Manufactures high performance torque converters and supplies transmission components for Ford, GM, Dodge and Import vehicles. Technical information is provided online.
- http://www.converter.com/

Taylor Vertex
- Manufacturer of high performance racing ignition wire, battery cable, primary wire, magnetos and accessories.
- http://www.taylorvertex.com/

Oliver Racing Parts
- Offers connecting rods, bearings and brake systems. Includes catalog and technical information.
- http://www.oliver-rods.com

Archer Racing Accessories
- Offers aftermarket auto parts, components and accessories. Includes product catalog and company profile.
- http://www.archerracing.com/

BoostController
- Offers gauges, valves, pipes, spark plug wires and intercooler assemblies.
- http://www.boostcontroller.com/

Underdrive pulleys
- Manufacturer of pulleys for turbochargers. Includes technical instructions and company profile.
- http://www.aspracing.com