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, Race Master, Intake, 2.02 in. Head Dia, 0.311 in. Stem Dia, 5.728 in. Length, For Dodge, Each

MANLEY Valve, Race Master, Intake, 2.02 in. Head Dia, 0.311 in. Stem Dia, 5.728 in. Length, For Dodge, Each

$50.05

MANLEY Valve, Race Master, Intake, 2.02 in. Head Dia, 0.3715 in. Stem Dia, 4.98 in. Length, For Chrysler SB, Set of 8

MANLEY Valve, Race Master, Intake, 2.02 in. Head Dia, 0.3715 in. Stem Dia, 4.98 in. Length, For Chrysler SB, Set of 8

$380.66

MANLEY Valve, Titanium, Intake, 2.25 in. Head Dia, 0.3415 in. Stem Dia, 5.25 in. Length, Set of 8

MANLEY Valve, Titanium, Intake, 2.25 in. Head Dia, 0.3415 in. Stem Dia, 5.25 in. Length, Set of 8

$2,550.76

MANLEY Valve, Severe Duty, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.121 in. Length, Set of 8

MANLEY Valve, Severe Duty, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.121 in. Length, Set of 8

$607.34

MANLEY Valve, Extreme Duty, Exhaust, 1.59 in. Head Dia, 0.3136 in. Stem Dia, 5.205 in. Length, For Chevrolet LT1, Each

MANLEY Valve, Extreme Duty, Exhaust, 1.59 in. Head Dia, 0.3136 in. Stem Dia, 5.205 in. Length, For Chevrolet LT1, Each

$129.64

MANLEY Valve, Titanium, Intake, Bead Loc, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.34 in. Length, Set of 8

MANLEY Valve, Titanium, Intake, Bead Loc, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.34 in. Length, Set of 8

$2,421.90