COMP Cams Camshaft CBVI XR271HR-12

Hydraulic Roller - Xtreme Energy Computer Controlled: Works well with ported heads, serious valve train upgrade required, needs 2200+ stall. Works well with ported heads, serious valve train upgrade required, needs 2200+ stall and programmer. Hydraulic Roller - Xtreme Energy Computer Controlled: Works well with ported heads, serious valve train upgrade required, needs 2200+ stall.; 271/279 Advertised Duration, 224/232 Duration .050", .591"/.601" Lift, 112 Lobe Separation; Adjustable valve train required; Must use bronze tip fuel pump pushrod when using high pressure or high volume pump; 1996-1999 Chevrolet 454/502 GEN VI Big Block Fits, Fitments 1996 Chevrolet C2500 Base 1996 Chevrolet C2500 Cheyenne 1996 Chevrolet C2500 Silverado 1996 Chevrolet C2500 Suburban Base 1996 Chevrolet C2500 Suburban LS 1996 Chevrolet C2500 Suburban LT 1996 Chevrolet C3500 Base 1996 Chevrolet C3500 Cheyenne 1996 Chevrolet C3500 Silverado 1996 Chevrolet Express 3500 Base 1996 Chevrolet Express 3500 LS 1996 Chevrolet G30 Beauville 1996 Chevrolet G30 Chevy Van 1996 Chevrolet G30 Hi-Cube 1996 Chevrolet G30 Sportvan 1996 Chevrolet K2500 Base 1996 Chevrolet K2500 Cheyenne 1996 Chevrolet K2500 Silverado 1996 Chevrolet K2500 Suburban Base 1996 Chevrolet K2500 Suburban LS 1996 Chevrolet K2500 Suburban LT 1996 Chevrolet K3500 Base 1996 Chevrolet K3500 Cheyenne 1996 Chevrolet K3500 Silverado 1996 Chevrolet P30 Base 1996 GMC C2500 Sierra SL 1996 GMC C2500 Sierra SLE 1996 GMC C2500 Sierra SLT 1996 GMC C2500 Suburban Base 1996 GMC C2500 Suburban SLE 1996 GMC C2500 Suburban SLT 1996 GMC C3500 Sierra SL 1996 GMC C3500 Sierra SLE 1996 GMC C3500 Sierra SLT 1996 GMC G3500 Magnavan 1996 GMC G3500 Rally 1996 GMC G3500 Rally Camper Special 1996 GMC G3500 Rally STX 1996 GMC G3500 Vandura 1996 GMC G3500 Vandura Special 1996 GMC K2500 Sierra SL 1996 GMC K2500 Sierra SLE 1996 GMC K2500 Sierra SLT 1996 GMC K2500 Suburban Base 1996 GMC K2500 Suburban SLE 1996 GMC K2500 Suburban SLT 1996 GMC K3500 Sierra SL 1996 GMC K3500 Sierra SLE 1996 GMC K3500 Sierra SLT 1996 GMC P3500 Base 1996 GMC Savana 3500 Base 1996 GMC Savana 3500 SLE 1997 Chevrolet C2500 Base 1997 Chevrolet C2500 Cheyenne 1997 Chevrolet C2500 Silverado 1997 Chevrolet C2500 Suburban Base 1997 Chevrolet C2500 Suburban LS 1997 Chevrolet C2500 Suburban LT 1997 Chevrolet C3500 Base 1997 Chevrolet C3500 Cheyenne 1997 Chevrolet C3500 Silverado 1997 Chevrolet Express 3500 Base 1997 Chevrolet Express 3500 LS 1997 Chevrolet K2500 Base 1997 Chevrolet K2500 Cheyenne 1997 Chevrolet K2500 Silverado 1997 Chevrolet K2500 Suburban Base 1997 Chevrolet K2500 Suburban LS 1997 Chevrolet K2500 Suburban LT 1997 Chevrolet K3500 Base 1997 Chevrolet K3500 Cheyenne 1997 Chevrolet K3500 Silverado 1997 Chevrolet P30 Base 1997 GMC C2500 Sierra SL 1997 GMC C2500 Sierra SLE 1997 GMC C2500 Sierra SLT 1997 GMC C2500 Suburban Base 1997 GMC C2500 Suburban SLE 1997 GMC C2500 Suburban SLT 1997 GMC C3500 Sierra SL 1997 GMC C3500 Sierra SLE 1997 GMC C3500 Sierra SLT 1997 GMC K2500 Sierra SL 1997 GMC K2500 Sierra SLE 1997 GMC K2500 Sierra SLT 1997 GMC K2500 Suburban Base 1997 GMC K2500 Suburban SLE 1997 GMC K2500 Suburban SLT 1997 GMC K3500 Sierra SL 1997 GMC K3500 Sierra SLE 1997 GMC K3500 Sierra SLT 1997 GMC P3500 Base 1997 GMC Savana 3500 Base 1997 GMC Savana 3500 SLE 1998 Chevrolet C2500 Cheyenne 1998 Chevrolet C2500 Silverado 1998 Chevrolet C2500 WT 1998 Chevrolet C2500 Suburban Base 1998 Chevrolet C2500 Suburban LS 1998 Chevrolet C3500 Cheyenne 1998 Chevrolet C3500 Silverado 1998 Chevrolet Express 3500 Base 1998 Chevrolet Express 3500 LS 1998 Chevrolet K2500 Cheyenne 1998 Chevrolet K2500 Silverado 1998 Chevrolet K2500 WT 1998 Chevrolet K2500 Suburban Base 1998 Chevrolet K2500 Suburban LS 1998 Chevrolet K3500 Cheyenne 1998 Chevrolet K3500 Silverado 1998 Chevrolet P30 Base 1998 GMC C2500 Sierra SL 1998 GMC C2500 Sierra SLE 1998 GMC C2500 Sierra SLT 1998 GMC C2500 Suburban Base 1998 GMC C2500 Suburban SLE 1998 GMC C2500 Suburban SLT 1998 GMC C3500 Sierra SL 1998 GMC C3500 Sierra SLE 1998 GMC C3500 Sierra SLT 1998 GMC K2500 Sierra SL 1998 GMC K2500 Sierra SLE 1998 GMC K2500 Sierra SLT 1998 GMC K2500 Suburban Base 1998 GMC K2500 Suburban SLE 1998 GMC K2500 Suburban SLT 1998 GMC K3500 Sierra SL 1998 GMC K3500 Sierra SLE 1998 GMC K3500 Sierra SLT 1998 GMC P3500 Base 1998 GMC Savana 3500 Base 1998 GMC Savana 3500 SLE 1999 Chevrolet C2500 Base 1999 Chevrolet C2500 LS 1999 Chevrolet C2500 Suburban Base 1999 Chevrolet C2500 Suburban LS 1999 Chevrolet C3500 Base 1999 Chevrolet C3500 LS 1999 Chevrolet Express 3500 Base 1999 Chevrolet Express 3500 LS 1999 Chevrolet K2500 Base 1999 Chevrolet K2500 LS 1999 Chevrolet K2500 Suburban Base 1999 Chevrolet K2500 Suburban LS 1999 Chevrolet K3500 Base 1999 Chevrolet K3500 LS 1999 Chevrolet P30 Base 1999 GMC C2500 Sierra SL 1999 GMC C2500 Sierra SLE 1999 GMC C2500 Sierra SLT 1999 GMC C2500 Suburban Base 1999 GMC C2500 Suburban SLE 1999 GMC C2500 Suburban SLT 1999 GMC C3500 Sierra SL 1999 GMC C3500 Sierra SLE 1999 GMC C3500 Sierra SLT 1999 GMC K2500 Sierra SL 1999 GMC K2500 Sierra SLE 1999 GMC K2500 Sierra SLT 1999 GMC K2500 Suburban Base 1999 GMC K2500 Suburban SLE 1999 GMC K2500 Suburban SLT 1999 GMC K3500 Sierra SL 1999 GMC K3500 Sierra SLE 1999 GMC K3500 Sierra SLT 1999 GMC P3500 Base 1999 GMC Savana 3500 Base 1999 GMC Savana 3500 SLE 2000 Chevrolet C2500 Base 2000 Chevrolet C2500 LS 2000 Chevrolet C3500 Base 2000 Chevrolet C3500 LS 2000 Chevrolet Express 3500 Base 2000 Chevrolet Express 3500 LS 2000 Chevrolet K2500 Base 2000 Chevrolet K2500 LS 2000 Chevrolet K3500 Base 2000 Chevrolet K3500 LS 2000 GMC C2500 Sierra SL 2000 GMC C2500 Sierra SLE 2000 GMC C2500 Sierra SLT 2000 GMC C3500 Sierra SL 2000 GMC C3500 Sierra SLE 2000 GMC C3500 Sierra SLT 2000 GMC K2500 Sierra SL 2000 GMC K2500 Sierra SLE 2000 GMC K2500 Sierra SLT 2000 GMC K3500 Sierra SL 2000 GMC K3500 Sierra SLE 2000 GMC K3500 Sierra SLT 2000 GMC Savana 3500 Base 2000 GMC Savana 3500 SLE