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 Exhaust Valve, SBF 8MM Stainless Steel 1.600 X 5.100 O.A.L. Pedestal Race, Set

AFR Exhaust Valve, SBF 8MM Stainless Steel 1.600 X 5.100 O.A.L. Pedestal Race, Set

$322.77

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

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 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, Set of 8

MANLEY Valve, Race Master, Exhaust, 1.71 in. Head Dia, 0.3415 in. Stem Dia, Stock in. Length, For Ford 351C, Set of 8

$380.66

MANLEY Valve, Race Flo, Intake, 1.94 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, For Ford SB, Set of 8

MANLEY Valve, Race Flo, Intake, 1.94 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, For Ford SB, Set of 8

$380.66