S-A Design Books [SAB]
http://www.cartechbooks.com/
Performance and 'How To' books

Safe-Quip [RQP]
http://www.racequip.com/
Safety equipment and related accessories

Safecraft [SFC]
http://www.safecraft.com/
Fire saftey products

Saldana Racing Tanks [PLA]
http://www.saldanaracingproducts.com/
Oil tanks

Sander Engineering [SND]
www.sanderengineering.com
Sprint car components

Sanderson Headers [SAN]
http://www.sandersonheaders.com/
Headers

Scat Cranks [SCA]
www.scatcrankshafts.com
Crankshafts

SCE [SCE]
http://www.scegaskets.com/
Copper gaskets

Schoenfeld Headers [SCH]
www.schoenfeldheaders.com
Circle track headers and accessories

Scorpion Performance Inc. [SPN]
http://www.scorpionperformance.com/
Performance valve train components

Scribner [SCR]
www.scribnerplastics.com
Fuel jugs and funnels

SCS [SCS]
http://www.scsgearbox.com/
Quick change gears

SCT Performance [SCT]
www.sctflash.com
Performance tuning modules and related components

Sealed Power [SEA ]
www.federal-mogul.com
Engine parts & chassis parts

Seals-It [SIC]
www.sealsit.com
Seals

Sharp Rockers [SHP]
http://www.harlandsharp.com/
Aluminum roller tip rocker arms

Shifnoid [SHF]
www.contenderperformance.com
Air and electric racing shifters

Shogun Industries Inc. [SHO]
http://www.shogunindustries.com/
Drag racing specialty components

ShurTrax [SHU]
http://www.shurtrax.com/
Non-scuff all weather traction products

Sierra [SIE]
http://www.sierraracing.com/
Brakes and accessories

Silv-O-Lite [KBP]
kb-silvolite.com
Performance pistons

Simpson [SIM]
http://www.simpsonraceproducts.com/
Helmets and safety equipment

Skyjacker Suspension [SKY]
http://www.skyjacker.com/
Truck performance suspension systems and components

SLP Performance Parts, Inc. [SLP]
http://www.slponline.com/
Performance automotive accessories

Sonic Racing [TIL]
http://www.tiltonracing.com/
Performance clutches and flywheels

Spal [SPA]
http://www.spal-usa.com/
Performance electric fans

Sparco Motor Sports Inc. [SCO]
http://www.sparcousa.com/
Safety equipment (gloves, suits, belts, seats)

Sportsman Racing Products [SRP]
http://www.srp.com/
Racing pistons

Stage 8 Fasteners [SGE]
http://www.stage8.com/
Locking Fasteners

Stainless Steel Brakes [SSB]
http://www.stainlesssteelbrakes.com/
Performance Brakes and related components

Standard Abrasives [STA]
http://www.sa-motorsports.com/
Porting, polishing and gasket removal kits

Steeda [STD]
www.steeda.com/
Performance Mustang Products

Stef's Performance Products [STF]
http://www.stefs.com/
Oils pans and accessories

Steve Smith Autosports [SSA]
http://www.ssapubl.com/
.Automotive racing 'How-To' books

Stewart Components [STE]
http://www.stewartcomponents.com/
Performance water pumps

Stewart Warner Performance [STW]
http://www.stewartwarner.com/
Tachs, gauges and related accessories

Stock Car Products [SCP]
http://www.scpdrysumps.com/
Dry sump pumps and accessories

Strange Engineering [STG]
http://www.strangeengineering.net/
Driveline components, axles and ring and pinions

Stroud Safety Inc. [STR]
http://www.stroudsafety.com/
Safety equipment

Super Swamper Tires [SST]
www.intercotire.com/
Super Swamper tires

Superchips Inc. [SCI]
http://www.superchips.com/
Engine performance programmers

Superior Axle and Gear [SAG]
www.footeaxle.com/
Performance axles and gears

Supertrapp [SPR]
http://www.supertrapp.com/
Performance exhaust mufflers

Superwinch [SUP]
http://www.superwinch.com/
Hubs, winches and accessories

Suspension Spring [SSS]
http://www.bluecoilspring.com/
Coil-over and stock car springs

Suspension Techniques [SUS]
http://www.stracing.com/
Performance suspension components

Sweet Manufacturing [SWE]
http://www.sweetmfg.biz/
Steering components and accessories

Swift Springs [SWI]
http://www.swiftsprings.com/
Racing coil springs

System One [SYS]
http://www.system1filters.com/
Fuel filters