Do you have a boosted, high-heat, high-horsepower engine? Manley offers custom race valves for your high performance engine. These Race Series Gen II custom valves are manufactured from XH-426 (exhaust) and NK-842 (intake) materials with hard tips and hardened grooves. They are tailored to length, groove position, head diameter, margin, and other specifications that you request when ordering. So, whether you're building an engine or are a serious racer, Manley is committed to seeing that you're there at the finish.

More From This Category

MANLEY Valve, Extreme/Severe Duty, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.64 in. Length, Gen II, Set of 8

MANLEY Valve, Extreme/Severe Duty, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 5.64 in. Length, Gen II, Set of 8

$683.76

MANLEY Valve, Race Master, Exhaust, Bead Loc, 31.5mm Head Dia, 0.2345 in. Stem Dia, 4.274 Length, For Ford 5.0L, Each

MANLEY Valve, Race Master, Exhaust, Bead Loc, 31.5mm Head Dia, 0.2345 in. Stem Dia, 4.274 Length, For Ford 5.0L, Each

$51.07

Sonnax Shuttle Valve Kit, GM, 8L45, 8L90, Each

Sonnax Shuttle Valve Kit, GM, 8L45, 8L90, Each

$59.91

MANLEY Valve, Race Master, Exhaust, 1.59 in. Head Dia, 0.3415 in. Stem Dia, 4.8 in. Length, For Ford, Each

MANLEY Valve, Race Master, Exhaust, 1.59 in. Head Dia, 0.3415 in. Stem Dia, 4.8 in. Length, For Ford, Each

$47.58

MANLEY Valve, Race Master, Exhaust, 30mm Head Dia, 0.274 in. Stem Dia, 4.587 Length, For Ford, Each

MANLEY Valve, Race Master, Exhaust, 30mm Head Dia, 0.274 in. Stem Dia, 4.587 Length, For Ford, Each

$51.07