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.

More From This Category

MANLEY Valve, Severe Duty, Intake, 2.3 in. Head Dia, 0.3415 in. Stem Dia, 5.344 in. Length, BBC, Each

MANLEY Valve, Severe Duty, Intake, 2.3 in. Head Dia, 0.3415 in. Stem Dia, 5.344 in. Length, BBC, Each

$75.93

MANLEY Valve, Pro Flo, Intake, 2.19 in. Head Dia, 0.372 in. Stem Dia, 5.218 in. Length, BBC, Set of 8

MANLEY Valve, Pro Flo, Intake, 2.19 in. Head Dia, 0.372 in. Stem Dia, 5.218 in. Length, BBC, Set of 8

$613.31

BBC 18° 11/32 Victory Titanium 1.800 X 5.935 O.A.L. With Hardened Tip Race Exhaust Valve, Set

BBC 18° 11/32 Victory Titanium 1.800 X 5.935 O.A.L. With Hardened Tip Race Exhaust Valve, Set

$2,237.93

MANLEY Valve, Race Master, Intake, 2.19 in. Head Dia, 0.3415 in. Stem Dia, 5.244 in. Length, For Ford 351C, Each

MANLEY Valve, Race Master, Intake, 2.19 in. Head Dia, 0.3415 in. Stem Dia, 5.244 in. Length, For Ford 351C, Each

$47.58