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

MANLEY Valve, Extreme Duty, Exhaust, 1.75 in. Head Dia, 0.3095 in. Stem Dia, 5.4 in. Length, Gen II, Each

MANLEY Valve, Extreme Duty, Exhaust, 1.75 in. Head Dia, 0.3095 in. Stem Dia, 5.4 in. Length, Gen II, Each

$139.15

MANLEY Valve, Severe Duty, Intake, 1.775 in. Head Dia, 0.3415 in. Stem Dia, 4.73 in. Length, For Buick V6, Set of 6

MANLEY Valve, Severe Duty, Intake, 1.775 in. Head Dia, 0.3415 in. Stem Dia, 4.73 in. Length, For Buick V6, Set of 6

$370.40

MILODON Valve, Exhaust, Race, Stainless Steel, 1.625 in. Dia, +.230 Long, For Chevrolet, Small Block, 350, 383, 400, Each

MILODON Valve, Exhaust, Race, Stainless Steel, 1.625 in. Dia, +.230 Long, For Chevrolet, Small Block, 350, 383, 400, Each

$58.38

MANLEY Valve, Race Master, Intake, 54.5mm Head Dia, 0.3122 in. Stem Dia, 5.424 Length, For Ford 6.2L, Each

MANLEY Valve, Race Master, Intake, 54.5mm Head Dia, 0.3122 in. Stem Dia, 5.424 Length, For Ford 6.2L, Each

$51.07

MANLEY Valve, Titanium, Intake, 2.1 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Height, Each

MANLEY Valve, Titanium, Intake, 2.1 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Height, Each

$302.72