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, Severe Duty, Intake, 2.02 in. Head Dia, 0.3415 in. Stem Dia, 5.14 in. Length, SBC, Each

MANLEY Valve, Severe Duty, Intake, 2.02 in. Head Dia, 0.3415 in. Stem Dia, 5.14 in. Length, SBC, Each

$78.54

MANLEY Valve, Titanium, Intake, Bead Loc, 2.1 in. Head Dia, 0.311 in. Stem Dia, 5.14 in. Height, Each

MANLEY Valve, Titanium, Intake, Bead Loc, 2.1 in. Head Dia, 0.311 in. Stem Dia, 5.14 in. Height, Each

$396.44

MANLEY Valve, Extreme Duty, Exhaust, 1.94 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, BBC, Set of 8

MANLEY Valve, Extreme Duty, Exhaust, 1.94 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, BBC, Set of 8

$1,037.08

MANLEY Valve, Race Master, Exhaust, Bead Loc, 1.675 in. Head Dia, 0.3125 in. Stem Dia, 5.1 in. Length, For Chrysler HEMI, Set of 8

MANLEY Valve, Race Master, Exhaust, Bead Loc, 1.675 in. Head Dia, 0.3125 in. Stem Dia, 5.1 in. Length, For Chrysler HEMI, Set of 8

$408.60

Trick Flow Valve, Intake, Stainless Steel, 2.350 in. Diameter, .341 in. Stem, 5.610 in. Length, Big For Chevrolet, Each

Trick Flow Valve, Intake, Stainless Steel, 2.350 in. Diameter, .341 in. Stem, 5.610 in. Length, Big For Chevrolet, Each

$86.97

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