| 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. |
| RPS_Performance_Products Manufacturer of high performance clutches and clutch systems for street and racing vehicles. Technical information and articles online. |
| RR-Racing Performance parts and accessories for Ford Probe GT, Mazda MX6, MX3, and 626. |
| R-S_MotorSports Seller of engine components as well as complete street and race engines. Includes product catalog. |
| 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. |
| Sallee_Chevrolet GM performance parts, aftermarket parts and engines. Price lists, customer photos, discussion board and chat. |
| Schatz_Motorsport Schatz Motorsport carries performance parts and accessories, racing apparel, and unique gift items for the Porsche enthusiast. |
| Schneider_Racing_Cams Manufacturer of camshafts and valve train components. Custom grinds from mild to wild. |
| SD_Concept_Engineering,_Inc_ Centrifugal supercharger kits and intercoolers. Technical information and system prices online. |
| Shark_Racing Supplier of aftermarket parts for Korean and Japanese cars from strut bars to body kits and spoilers. Includes product overview. |
| Shock_Values Retailer of car parts ranging from body kits to turbo racing kits. Includes product catalog. |
| Shogun_Industries Manufacturer of cooling and electrical components for drag racing cars. Includes technical information of products and company profile. |
| Silicone_Intake_Systems Offers intercoolers and piping systems for turbo cars. Includes product catalog and company profile. |
| SpecTuning Offers performance car parts. Includes product catalogue. |
| Speed_Engineering Offers a range of parts and accessories for muscle cars and trucks. Includes product catalog and company profile. |
| Speed_Freaks Specializing in parts designed for drag, circle and street racers. |
| Speedometer_Shop Wholesale and retail instrument sales and repair. Conversion and restoration for street rods, muscle cars, classic cars, import cars, racers, and trucks. |
| 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. |
| 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. |
