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. Image is a representation. Actual product may vary

More From This Category

MILODON Valve, Exhaust, Race, Stainless Steel, 1.81 in. Diameter, Mopar, Big Block, 383 - 440, Each

MILODON Valve, Exhaust, Race, Stainless Steel, 1.81 in. Diameter, Mopar, Big Block, 383 - 440, Each

$58.50

MANLEY Valve, Extreme Duty, Exhaust, 1.95 in. Head Dia, 0.3715 in. Stem Dia, 5.02 in. Length, Set of 8

MANLEY Valve, Extreme Duty, Exhaust, 1.95 in. Head Dia, 0.3715 in. Stem Dia, 5.02 in. Length, Set of 8

$995.14

MANLEY Valve, Severe Duty, Exhaust, 1.71 in. Head Dia, 0.3415 in. Stem Dia, 5.167 in. Length, Set of 8

MANLEY Valve, Severe Duty, Exhaust, 1.71 in. Head Dia, 0.3415 in. Stem Dia, 5.167 in. Length, Set of 8

$607.34

MANLEY Valve, Race Master, Exhaust, 37.0mm Head Dia, 0.274 in. Stem Dia, 4.65 Length, For Ford, Each

MANLEY Valve, Race Master, Exhaust, 37.0mm Head Dia, 0.274 in. Stem Dia, 4.65 Length, For Ford, Each

$51.07

MANLEY Valve, Race Flo, Intake, 33.5 mm Head Dia, 6 mm Stem Dia, 100.55 mm Length, Each

MANLEY Valve, Race Flo, Intake, 33.5 mm Head Dia, 6 mm Stem Dia, 100.55 mm Length, Each

$49.91

MANLEY Valve, Race Series, Exhaust, 1.26 in. Head Dia, 0.215 in. Stem Dia, 4.764 in. Length, Gen II, Set of 8

MANLEY Valve, Race Series, Exhaust, 1.26 in. Head Dia, 0.215 in. Stem Dia, 4.764 in. Length, Gen II, Set of 8

$547.03