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

AFR Intake Valve, SBF 8MM Stainless Steel 2.020 X 5.080 O.A.L. Pedestal Race, Set

AFR Intake Valve, SBF 8MM Stainless Steel 2.020 X 5.080 O.A.L. Pedestal Race, Set

$322.77

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

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

$55.65

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

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

$948.83

AFR Exhaust Valve, BB Ford Bullitt Stud Girdle - Requires Adjusting nut #6214

AFR Exhaust Valve, BB Ford Bullitt Stud Girdle - Requires Adjusting nut #6214

$514.76

MANLEY Valve, Race Master, Exhaust, 1.71 in. Head Dia, 0.3415 in. Stem Dia, Stock in. Length, For Ford 351C, Each

MANLEY Valve, Race Master, Exhaust, 1.71 in. Head Dia, 0.3415 in. Stem Dia, Stock in. Length, For Ford 351C, Each

$47.58

AFR Intake Valve, SBF 8MM Stainless Steel 1.900 X 4.900 O.A.L. Stud Mount Race, 1 Ea.

AFR Intake Valve, SBF 8MM Stainless Steel 1.900 X 4.900 O.A.L. Stud Mount Race, 1 Ea.

$38.96