This is a set of "Severe Duty Pro Flo Intake and Exhaust Valves" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. These Valves are for Factory Iron production heads only.
Intake, Stainless Steel, 4.730 in. Length, 1.710 in. Diameter, 0.3415 in. Diameter Stem, Set of 6
Exhaust, Stainless Steel, 1.500 in. Diameter, .342 in. Stem, 4.725 in. Length, Set of 6
