Brands (S)
- Sabo
- Sac
- Sachs
- Saddleman
- Sankei
- Sankei/555
- Santech
- Sbs
- Scan-tech
- Scan-tech products
- Schadek
- Schrader
- Seafit
- Seatcovers4less
- Ses trims
- Siemens
- Sierra
- Sii
- Silla
- Silverline
- Skf
- Skunk 2
- Skyjacker
- Skyjacker systems
- Sl
- Smittybilt
- Snap
- Sng
- Spectra
- Spectre
- Sperry top-sider
- Spg
- Spoilers4less
- Sport master
- Sportz
- Spyder
- Ssbc
- Sst
- Stabilus
- Stampede
- Standard
- Standard motor products
- Stant
- Starla
- Steelcraft
- Stillen
- Stoptech
- Stp
- Street and performance electronics
- Street performance
- Street scene
- Stribel
- Sumitomo
- Super swamper
- Superchips
- Superlift
- Supersprings
- Superwinch
- Surco
- Swag
- Swf
- Sylvania