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

Sonnax Oversized Tcc Regulator Valve Kit, Chrysler, 40Te/S, 41Ae/Tes, 42Le/Rle, 62Te, Each

Sonnax Oversized Tcc Regulator Valve Kit, Chrysler, 40Te/S, 41Ae/Tes, 42Le/Rle, 62Te, Each

$48.17

MANLEY Valve, Severe Duty, Intake, 2.055 in. Head Dia, .3110 in. Hollow Stem, 5.01 in. Length, SBC, Each

MANLEY Valve, Severe Duty, Intake, 2.055 in. Head Dia, .3110 in. Hollow Stem, 5.01 in. Length, SBC, Each

$175.04

Sonnax Oversized Pressure Regulator & Boost Valve Kit, GM 6L45/50/80/90, Each

Sonnax Oversized Pressure Regulator & Boost Valve Kit, GM 6L45/50/80/90, Each

$135.23

Sonnax Forward Control Valve Kit, Ford, Ax4N, 4F50N, Each

Sonnax Forward Control Valve Kit, Ford, Ax4N, 4F50N, Each

$32.54

Sonnax Oversized Tc Switch Valve, Chrysler, Ch 845Re, ZF8Hp45/55/70, Each

Sonnax Oversized Tc Switch Valve, Chrysler, Ch 845Re, ZF8Hp45/55/70, Each

$48.53

MANLEY Valve, Extreme/Severe Duty, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.6 in. Length, Gen II, Set of 8

MANLEY Valve, Extreme/Severe Duty, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.6 in. Length, Gen II, Set of 8

$1,118.73