BR Expansion Plug Kit Compatible With : 1991 454, 454HO, 502 CID, 366 Generation 5 Engines ( Marine Performance ) Compatible With : 1991-1998 Chevrolet B-7 V8, 6.0L / 366 CID, OHV 16 Valve, Vin : P, 1991-1993 Chevrolet C1500 V8, 6.2L / 379 CID OHV, 16 Valve, Vin C,J