Comp Cams SBC INT VALVE 2.020 X 11/32 +.100 LONG ECU Reprogramming or do I have to

or do I have to buy both

Civic Shuttle

F (260 deg

Sierra SLX 1982 - 1996 GMC Jimmy Base 2000 - 2001 GMC Jimmy Diamond Edition 1998 - 2000 GMC Jimmy Envoy 1982 - 1985 GMC Jimmy High Sierra 1982 - 1990 GMC Jimmy Sierra Classic 1982 GMC Jimmy Sierra Grande

Comp Cams SBC INT VALVE 2.020 X 11/32 +.100 LONG ECU Reprogramming or do I have toSportsman Stainless Steel Valves; Intake 2. 020 x 11 32 +. 100 Long COMP Cams Sportsman Stainless Steel Valves are available in a variety of diameters and stem lengths for street competition engines. Made from 21 4N forged high strength steel alloy with 50 HRc minimum hard tips (eliminates the need for a lash cap), these valves are state of the art, delivering tremendous performance and durability. Recommended for all hydraulic, mechanical and roller