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. Image is a representation. Actual product may vary

More From This Category

MANLEY Valve, Titanium, Intake, Bead Loc, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.54 in. Height, Each

MANLEY Valve, Titanium, Intake, Bead Loc, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.54 in. Height, Each

$302.72

Sonnax Oversized 1-2/4-5 Overlap Control Valve Kit, Mercedes 722.6, Each

Sonnax Oversized 1-2/4-5 Overlap Control Valve Kit, Mercedes 722.6, Each

$153.99

MANLEY Valve, Race Master, Exhaust, 1.88 in. Head Dia, 0.3415 in. Stem Dia, 5.17 in. Length, For Ford BB, Set of 8

MANLEY Valve, Race Master, Exhaust, 1.88 in. Head Dia, 0.3415 in. Stem Dia, 5.17 in. Length, For Ford BB, Set of 8

$380.66

MANLEY Valve, Extreme Duty, Exhaust, 1.9 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, For Chevrolet BB, Each

MANLEY Valve, Extreme Duty, Exhaust, 1.9 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, For Chevrolet BB, Each

$129.64

Sonnax Lube On Demand Valve Kit, GM, 6T40 (Gen.3), Each

Sonnax Lube On Demand Valve Kit, GM, 6T40 (Gen.3), Each

$89.71