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, Titanium, Intake, Bead Loc, 2.23 in. Head Dia, 0.311 in. Stem Dia, 6.25 in. Length, Each

MANLEY Valve, Titanium, Intake, Bead Loc, 2.23 in. Head Dia, 0.311 in. Stem Dia, 6.25 in. Length, Each

$399.71

MILODON Valves, Exhaust, Stainless Steel, 1.725 in. Diameter, For Ford, Big Block, 429 - 460, Set of 8

MILODON Valves, Exhaust, Stainless Steel, 1.725 in. Diameter, For Ford, Big Block, 429 - 460, Set of 8

$395.72

MANLEY Valve, Street Master, Intake, 2.055 in. Head Dia, 0.3415 in. Stem Dia, 5.011 in. Length, SBC, Set of 8

MANLEY Valve, Street Master, Intake, 2.055 in. Head Dia, 0.3415 in. Stem Dia, 5.011 in. Length, SBC, Set of 8

$280.36

MANLEY Valve, Race Flo, Intake, 2.11 in. Head Dia, 0.3415 in. Stem Dia, 5.215 in. Length, For Pontiac, Set of 8

MANLEY Valve, Race Flo, Intake, 2.11 in. Head Dia, 0.3415 in. Stem Dia, 5.215 in. Length, For Pontiac, Set of 8

$380.66

MANLEY Valve, Titanium, X20 1.825 in. Head Dia, .3110 in. Stem Dia, Bead Loc, Set of 8

MANLEY Valve, Titanium, X20 1.825 in. Head Dia, .3110 in. Stem Dia, Bead Loc, Set of 8

$2,550.76

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.84 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Length, Each

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.84 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Length, Each

$318.84