Manley Severe Duty series performance valves are a great choice for your high performance or race engine. All valves are made from stainless steel (intakes are NK-844; exhausts are XH-428) with chrome stems and hardened valve tips. Severe Duty series valves are made of superior materials, are fully machined and swirl polished, and are available with either undercut "Pro Flo" stems or straight stems.

More From This Category

MANLEY Valve, Race Master, Intake, 2.19 in. Head Dia, 0.3415 in. Stem Dia, 5.244 in. Length, For Ford 351C, Set of 8

MANLEY Valve, Race Master, Intake, 2.19 in. Head Dia, 0.3415 in. Stem Dia, 5.244 in. Length, For Ford 351C, Set of 8

$380.66

AFR Exhaust Valve, SBF 8mm Inconel 1.570 X 5.030 O.A.L Race, 1 Ea.

AFR Exhaust Valve, SBF 8mm Inconel 1.570 X 5.030 O.A.L Race, 1 Ea.

$111.30

AFR Intake Valve, BBF 11/32” Stainless Steel 2.300 X 5.245 O.A.L. Race, Set

AFR Intake Valve, BBF 11/32” Stainless Steel 2.300 X 5.245 O.A.L. Race, Set

$436.85

AFR Exhaust Valve, BBF 11/32” Inconel 1.760 X 5.050 O.A.L. Race, Set

AFR Exhaust Valve, BBF 11/32” Inconel 1.760 X 5.050 O.A.L. Race, Set

$898.75