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, Titanium, Intake, 2.18 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Height, Set of 8

MANLEY Valve, Titanium, Intake, 2.18 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Height, Set of 8

$2,421.90

MILODON Valve, Exhaust, Race, Stainless Steel, 1.60 in. Diameter, +.200 Long, For Chevrolet, Small Block, 350, 383, 400, Each

MILODON Valve, Exhaust, Race, Stainless Steel, 1.60 in. Diameter, +.200 Long, For Chevrolet, Small Block, 350, 383, 400, Each

$62.25

MANLEY Valve, Race Master, Intake, 2.3 in. Head Dia, 0.3715 in. Stem Dia, 5.344 in. Length, BBC, Set of 8

MANLEY Valve, Race Master, Intake, 2.3 in. Head Dia, 0.3715 in. Stem Dia, 5.344 in. Length, BBC, Set of 8

$380.66

MANLEY Valve, Race Master, Intake, 42mm Head Dia, 0.313 in. Stem Dia, 4.606 in. Length, Volkswagen, Each

MANLEY Valve, Race Master, Intake, 42mm Head Dia, 0.313 in. Stem Dia, 4.606 in. Length, Volkswagen, Each

$47.58

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.36 in. Height, Set of 8

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.36 in. Height, Set of 8

$2,461.66

MANLEY Valve, Race Master, Exhaust, 33.5 mm Head Dia, 7 mm Stem Dia, 99 mm Length, For Toyota 1FZ-FE, Each

MANLEY Valve, Race Master, Exhaust, 33.5 mm Head Dia, 7 mm Stem Dia, 99 mm Length, For Toyota 1FZ-FE, Each

$68.72