| Split_Second Manufactures instrumentation and calibration products. Split Second products are widely used to add turbos and superchargers to naturally aspirated engines. |
| Spooled_Motorsports Specializes in turbochargers for factory and performance applications. Includes product catalog. |
| Spyder__Engineering Lotus compatible parts. |
| STchiptuning Supplier of tuning systems for car and truck. Includes service overview and chip database. |
| Steeda_Autosports Airfilter systems, exhaust systems, superchargers, suspension, and rims for most Ford vehicles. |
| Straightline_Performance Offers engine parts and accessories, as well as flow bench work, machining and related services. Includes product catalog and company profile. |
| Sube_Sports Driving suits, gloves, shoes, pit crew accessories, seats, harnesses, safety equipment, PIAA lights and light accessories plus more products for racers. |
| SuperchargersOnline_com Retailer of superchargers and related accessories for all major brands. Includes news, technical data and product catalog. |
| Taylor_Vertex Manufacturer of high performance racing ignition wire, battery cable, primary wire, magnetos and accessories. |
| 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. |
| TnT_Performance_and_Repair Specializes in diesel engine diagnostic systems and performance components. Includes product catalogue and company profile. |
| Tokyo_Express Provide performance and tuning parts for Honda, Mitsubishi, Subaru, Nissan, Mazda, and Toyota. |
| 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. |
| Top_Gear Sells a variety if accessories, snow chains, computer and tuning tools, and air horns. |
| 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. |
| Treadstone_Performance Retailer of induction and heat exchanger products. Includes product catalog. |
| Trick_Flow Manufacturer of high performance cylinder heads, camshafts, pistons and intake manifolds. Technical data and installation instructions online. |
| Truppi-Kling_High_Performance Competition engine builder. Racing engines and performance parts for NHRA, Dirt and Outlaw. |
| Turbo_City Turbochargers, electronic fuel injection, TBI performance accessories for Jeep, Chevy, and Volkswagen. |
| Turbo_Wholesale_Distribution Distributor of turbo parts and related systems. Includes product catalog. |
| TurboXS Offers blowoff valves, boost controllers and related equipment for turbocharged engines. Includes product overview and company profile. |
| Turner_Motorsport Specialist in high performance BMW accessories. Online catalog with photos and prices. |
| Underdrive_pulleys Manufacturer of pulleys for turbochargers. Includes technical instructions and company profile. |
| Unique_Aluminum_Products Manufacturer of computer designed, light weight, aluminum sheet metal valve covers for many facets of motorsports. |
| 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. |
| 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 electr |
| USDieselChips_com Offers diesel power chips and related products. Includes installation instructions, technical data, testimonies and FAQs. |
| V8_Conversions Specializing in Rover V8 conversions for MGB roadster and GT models. Kits, engine and chassis parts, and accessories. |
| Volant_Air_Intakes Offers air intake systems for a wide variety of cars, trucks and SUV. Includes product overview and dealer list. |
| Vortex_Valve Device designed to improve air flow intake to the engine. Includes technical data and emission reports. |
| Wake_Performance Offers parts and accessories for a variety of cars. Includes product catalog and company profile. |
| Weber_Carburetors Distributor of carburetors, conversion kits and fuel systems. Includes catalogue and pricing. |
| West_Coast_Differentials Ring and pinion gears, lockers and axle parts. Rear end and differential parts for 4 wheel, off road or performance vehicles. |
| West_Covina_Toyota_Sport Vehicle-specific online shopping for TRD and Toyota parts. Full online catalog. |
| 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 engine |
| 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. |
| Wilson_Competition Manufacturer of Builtwiser sprint cars and components. Also manufactures Wilson competition carburetors and parts. Products lists with prices online. |
| Wilson_Manifolds Manufacturer of performance parts and kits, with focus on nitrous injection systems. Includes product overview, company profile and catalogue. |
| The_Winner\'s_Circle Distributor of Austin Healey Sprite and MG Midget restoration and competition parts. Classified ads. |
| Winters_Performance_Products Manufacturer of high performance auto parts including rear ends, hubs, differentials, axles, transmissions, shifters and gears. |
