Manley Extreme Duty Series performance steel valves are a great choice for supercharged, alcohol-burning, or high-revving engines. These engines generate a lot of heat and require special valves that can handle that kind of punishment. All valves are made from the best stainless steel available, with chrome stems and hardened valve tips. Extreme Duty Series valves are swirl-polished and fully machined and available with either undercut heads or straight stems. Image is a representation. Actual product may vary

More From This Category

MANLEY Valve, Race Master, Intake, 2.125 in. Head Dia, 0.3415 in. Stem Dia, 5.04 in. Length, For Chevrolet SB, Each

MANLEY Valve, Race Master, Intake, 2.125 in. Head Dia, 0.3415 in. Stem Dia, 5.04 in. Length, For Chevrolet SB, Each

$47.58

MANLEY Valve, Custom, Titanium, .3415 in. Stem Dia, Each

MANLEY Valve, Custom, Titanium, .3415 in. Stem Dia, Each

$290.76

MANLEY Valve, Race Master, Exhaust, 1.9 in. Head Dia, 0.31 in. Stem Dia, 4.915 in. Length, For Chrysler HEMI, Each

MANLEY Valve, Race Master, Exhaust, 1.9 in. Head Dia, 0.31 in. Stem Dia, 4.915 in. Length, For Chrysler HEMI, Each

$51.07

MANLEY Valve, Street Master, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, SBC, Set of 8

MANLEY Valve, Street Master, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 4.911 in. Length, SBC, Set of 8

$280.36

MANLEY Valve, Titanium, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.36 in. Height, Each

MANLEY Valve, Titanium, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.36 in. Height, Each

$307.70