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, Extreme/Severe Duty, Exhaust, 1.94 in. Head Dia, 0.3415 in. Stem Dia, 6 in. Length, Gen II, Each

MANLEY Valve, Extreme/Severe Duty, Exhaust, 1.94 in. Head Dia, 0.3415 in. Stem Dia, 6 in. Length, Gen II, Each

$72.68

MANLEY Valve, Race Series, Exhaust, 1.625 in. Head Dia, 0.311 in. Stem Dia, 5.7 in. Length, Gen II, Each

MANLEY Valve, Race Series, Exhaust, 1.625 in. Head Dia, 0.311 in. Stem Dia, 5.7 in. Length, Gen II, Each

$70.15

Sonnax Line Pressure Modulator Plunger Valve Kit, Ford, 4R100/E4Od Lg 8 Cyl, Each

Sonnax Line Pressure Modulator Plunger Valve Kit, Ford, 4R100/E4Od Lg 8 Cyl, Each

$34.84

MANLEY Valve, Race Master, Intake, 46.83mm Head Dia, 0.275 in. Stem Dia, 4.63 Length, For Ford, Each

MANLEY Valve, Race Master, Intake, 46.83mm Head Dia, 0.275 in. Stem Dia, 4.63 Length, For Ford, Each

$51.07