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/Severe Duty, Intake, 2.2 in. Head Dia, 0.311 in. Stem Dia, 5.75 in. Length, Gen II, Each

MANLEY Valve, Extreme/Severe Duty, Intake, 2.2 in. Head Dia, 0.311 in. Stem Dia, 5.75 in. Length, Gen II, Each

$91.60

MANLEY Valve, Titanium, Intake, Bead Loc, 2.1 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Height, Set of 8

MANLEY Valve, Titanium, Intake, Bead Loc, 2.1 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Height, Set of 8

$2,421.90

MANLEY Valve, Race Flo, Intake, 34 mm Head Dia, 6 mm Stem Dia, 101.35 mm Length, For Mazda Miata, Set of 8

MANLEY Valve, Race Flo, Intake, 34 mm Head Dia, 6 mm Stem Dia, 101.35 mm Length, For Mazda Miata, Set of 8

$399.33

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.9 in. Head Dia, 0.3415 in. Stem Dia, 6.45 in. Length, For Pontiac, Set of 8

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.9 in. Head Dia, 0.3415 in. Stem Dia, 6.45 in. Length, For Pontiac, Set of 8

$2,550.76

MANLEY Valve, Titanium, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.16 in. Height, Set of 8

MANLEY Valve, Titanium, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.16 in. Height, Set of 8

$2,461.66