| 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. |
| Quarter_Master_Racing_Clutches Clutches and drive line products for circle, track and road racing. Catalog and installation instructions are available online. |
| 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. |
| Race_Car_Supply Provides products, services, and information on Formula Vee and Pro Formula Vee racing. Includes contact information and related links. |
| 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. |
| RAM_Clutches Manufacturer of performance clutch systems. Flywheels, pressure plates and clutch disks. |
| Randercar_Race_Car_Manufacturers Manufacturer of race car chassis, parts and supplies. |
| Rapid_Motorsports Supplier of products for race applications and street performance. Includes product catalogue and company profile. |
| RASE_Products US manufacturer of products designed for the small bore road racing industry. Includes the RJE220 sequential shift racing transmission and the RJE300 non quick change racing differential. |
| RaZor_Performance_Products Manufacturer of dry sump oiling systems. |
| Rebco_Performance_Products Specializing in electronic wheel scale systems, dashboard instrumentation, chassis setup, and pit equipment. Includes tech tips and classifieds. |
| Reed_Cams_Inc_ Engineers and designs line of camshafts, components, and carburetors. Custom cam designs, coordinated valve train components and flow-balanced carburetor modifications. |
| 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 |
| Ross_Machine_Racing Offers engine air intake and fuel delivery systems. Includes product catalog, gallery and project overview. |
| 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. |
