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

Trick Flow Valve, Exhaust, Stainless Steel, 1.450 in. Diameter, 7.0mm Stem, 120.14mm Length, For Ford 4.6L/5.4L, Each

Trick Flow Valve, Exhaust, Stainless Steel, 1.450 in. Diameter, 7.0mm Stem, 120.14mm Length, For Ford 4.6L/5.4L, Each

$56.52

MANLEY Valve, Custom, Titanium, .3110 in. Stem Dia, Set of 8

MANLEY Valve, Custom, Titanium, .3110 in. Stem Dia, Set of 8

$2,550.76

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.625 in. Head Dia, 0.311 in. Stem Dia, 5.95 in. Length, Set of 8

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.625 in. Head Dia, 0.311 in. Stem Dia, 5.95 in. Length, Set of 8

$2,564.57

MANLEY Valve, Race Master, Exhaust, 1.59 in. Head Dia, 0.3415 in. Stem Dia, 4.8 in. Length, For Ford, Set of 4

MANLEY Valve, Race Master, Exhaust, 1.59 in. Head Dia, 0.3415 in. Stem Dia, 4.8 in. Length, For Ford, Set of 4

$190.33

MANLEY Valve, Custom, Titanium, .3110 in. Stem Dia, Set of 8

MANLEY Valve, Custom, Titanium, .3110 in. Stem Dia, Set of 8

$2,293.03