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

Sonnax Oversized Torque Converter Lube Regulator & Plunger Valve Kit, JF015E (Reof11A), Each

Sonnax Oversized Torque Converter Lube Regulator & Plunger Valve Kit, JF015E (Reof11A), Each

$89.18

Sonnax Oversized Pressure Regulator Valve, ZF5Hp19, Early Vb E17, Each

Sonnax Oversized Pressure Regulator Valve, ZF5Hp19, Early Vb E17, Each

$65.05

MANLEY Valve, Race Flo, Intake, 32.0 mm Head Dia, 6 mm Stem Dia, 99.60 mm Length, Set of 8

MANLEY Valve, Race Flo, Intake, 32.0 mm Head Dia, 6 mm Stem Dia, 99.60 mm Length, Set of 8

$399.33

MANLEY Valve, Race Flo, Intake, 2.1 in. Head Dia, 0.3133 in. Stem Dia, Hollow Stem, 4.874 in. Length, For Chevrolet LS1, Set of 8

MANLEY Valve, Race Flo, Intake, 2.1 in. Head Dia, 0.3133 in. Stem Dia, Hollow Stem, 4.874 in. Length, For Chevrolet LS1, Set of 8

$1,138.39

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.64 in. Height, Set of 8

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.64 in. Height, Set of 8

$2,461.66

MANLEY Valve, Titanium, Intake, Bead Loc, 2.5 in. Head Dia, 0.3415 in. Stem Dia, 6.4 in. Length, Set of 8

MANLEY Valve, Titanium, Intake, Bead Loc, 2.5 in. Head Dia, 0.3415 in. Stem Dia, 6.4 in. Length, Set of 8

$2,591.35