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

AFR Exhaust Valve, BBC 24° Stainless Steel 1.880 x 5.450 O.A.L. STD 11/32 Tulip Race, Set

AFR Exhaust Valve, BBC 24° Stainless Steel 1.880 x 5.450 O.A.L. STD 11/32 Tulip Race, Set

$461.90

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

AFR Exhaust Valve, BBC 24° 1.880 x 5.450 O.A.L. Tulip Inconel, Ea.

AFR Exhaust Valve, BBC 24° 1.880 x 5.450 O.A.L. Tulip Inconel, Ea.

$111.30

AFR Exhaust Valve, BBC 24° Stainless Steel 1.880 x 5.450 O.A.L. 11/32 Stem (Nail Head) Race, Ea.

AFR Exhaust Valve, BBC 24° Stainless Steel 1.880 x 5.450 O.A.L. 11/32 Stem (Nail Head) Race, Ea.

$55.65