Manley Severe Duty Pro Flo 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 offer improved flow with undercut "Pro Flo" stems. Image is a representation. Actual product may vary

More From This Category

MANLEY Valve, Severe Duty, Exhaust, 1.76 in. Head Dia, 0.3415 in. Stem Dia, 5.067 in. Length, Set of 8

MANLEY Valve, Severe Duty, Exhaust, 1.76 in. Head Dia, 0.3415 in. Stem Dia, 5.067 in. Length, Set of 8

$607.34

MANLEY Valve, Severe Duty, Intake, 2.4 in. Head Dia, 0.3415 in. Stem Dia, 6.03 in. Length, Each

MANLEY Valve, Severe Duty, Intake, 2.4 in. Head Dia, 0.3415 in. Stem Dia, 6.03 in. Length, Each

$78.54

Sonnax Accumulator Valve Train Kit, 200-4R, 4L60, 4L60-E, Each

Sonnax Accumulator Valve Train Kit, 200-4R, 4L60, 4L60-E, Each

$93.28

MANLEY Valve, Intake, Bead Loc, 2.5 in. Head Dia, 0.3415 in. Stem Dia, 6.475 in. Length, Each

MANLEY Valve, Intake, Bead Loc, 2.5 in. Head Dia, 0.3415 in. Stem Dia, 6.475 in. Length, Each

$323.90

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.56 in. Height, Each

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.56 in. Height, Each

$307.70