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.

More From This Category

Trick Flow Valve, Intake, Stainless Steel, 2.080 in. Diameter, .341 in. Stem, 5.300 in. Length, Small For Ford, Each

Trick Flow Valve, Intake, Stainless Steel, 2.080 in. Diameter, .341 in. Stem, 5.300 in. Length, Small For Ford, Each

$76.10

MANLEY Valve, Titanium, Intake, 2.02 in. Head Dia, 0.3415 in. Stem Dia, 5.14 in. Height, Set of 8

MANLEY Valve, Titanium, Intake, 2.02 in. Head Dia, 0.3415 in. Stem Dia, 5.14 in. Height, Set of 8

$2,421.90

MANLEY Valve, Titanium, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 4.96 in. Height, Each

MANLEY Valve, Titanium, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 4.96 in. Height, Each

$307.70

MANLEY Valve, Race Master, Exhaust, 1.59 in. Head Dia, 0.3136 in. Stem Dia, 4.923 in. Length, For Chevrolet L92, Each

MANLEY Valve, Race Master, Exhaust, 1.59 in. Head Dia, 0.3136 in. Stem Dia, 4.923 in. Length, For Chevrolet L92, Each

$51.07

MANLEY Valve, Titanium, Intake, Bead Loc, 2.2 in. Head Dia, 0.311 in. Stem Dia, 5.95 in. Length, Set of 8

MANLEY Valve, Titanium, Intake, Bead Loc, 2.2 in. Head Dia, 0.311 in. Stem Dia, 5.95 in. Length, Set of 8

$2,564.57

MANLEY Valve, Race Master, Exhaust, 1.615 in. Head Dia, 0.3136 in. Stem Dia, 5.23 in. Length, For Chevrolet LS7, Each

MANLEY Valve, Race Master, Exhaust, 1.615 in. Head Dia, 0.3136 in. Stem Dia, 5.23 in. Length, For Chevrolet LS7, Each

$51.07