Manley Severe Duty 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 are available with either undercut "Pro Flo" stems or straight stems.

More From This Category

MANLEY Valve, Pro Flo, Intake, 2.065 in. Head Dia, 0.372 in. Stem Dia, 5.218 in. Length, BBC, Set of 8

MANLEY Valve, Pro Flo, Intake, 2.065 in. Head Dia, 0.372 in. Stem Dia, 5.218 in. Length, BBC, Set of 8

$613.31

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

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

$2,868.76

AFR Intake Valve, BBC 24° Stainless Steel 2.190 x 5.460 O.A.L 11/32 Stem Std Race, Ea.

AFR Intake Valve, BBC 24° Stainless Steel 2.190 x 5.460 O.A.L 11/32 Stem Std Race, Ea.

$55.65

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

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