TFS-515B0008 SBF EFI BOX UPPER BARE
TFS-51500008 SBF EFI BOX UPPER SILVER
TFS-51511008 SBF EFI BOX UPPER BLACK
TFS-515B0009 351W SBF EFI BOX UPPER BARE
TFS-51500009 351W SBF EFI BOX UPPER SILVER
TFS-51511009 351W SBF EFI BOX UPPER BLACK
TFS-515UB008 SBF EFI BOX UPPER ONLY BARE
TFS-515U0008 SBF EFI BOX UPPER ONLY SILVER
TFS-515U1108 SBF EFI BOX UPPER ONLY BLACK
Plenum volume and port area maximized for 347-393. There is about 6" of runner. So putting it on a stock engine, with stock heads, wouldn't use this intake to its potential.