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, Titanium, All Pro 1.600 in. Head Dia., .3415 in. Stem Dia., Each

MANLEY Valve, Titanium, All Pro 1.600 in. Head Dia., .3415 in. Stem Dia., Each

$218.25

MANLEY Valve, Custom, Titanium, .3110 in. Stem Dia., Set of 8

MANLEY Valve, Custom, Titanium, .3110 in. Stem Dia., Set of 8

$1,988.85

Sonnax Accumulator Valve Train Kit, 200-4R, 4L60, 4L60-E, Each

Sonnax Accumulator Valve Train Kit, 200-4R, 4L60, 4L60-E, Each

$85.85

Sonnax Tcc Regulator Valve, Ford, 4R44E/4R55E, 5R44E/5R55E, Each

Sonnax Tcc Regulator Valve, Ford, 4R44E/4R55E, 5R44E/5R55E, Each

$27.64

Sonnax Oversized 3-4 Accumulator Valve Kit, GM 4T65E, Each

Sonnax Oversized 3-4 Accumulator Valve Kit, GM 4T65E, Each

$63.90