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

MANLEY Valve, Race Master, Exhaust, Bead Loc, 36.0mm Head Dia, 0.274 in. Stem Dia, 4.65 Length, For Ford, Each

MANLEY Valve, Race Master, Exhaust, Bead Loc, 36.0mm Head Dia, 0.274 in. Stem Dia, 4.65 Length, For Ford, Each

$51.07

MANLEY Valve, Intake, Bead Loc, 2.45 in. Head Dia, 0.311 in. Stem Dia, 6.16 in. Length, Each

MANLEY Valve, Intake, Bead Loc, 2.45 in. Head Dia, 0.311 in. Stem Dia, 6.16 in. Length, Each

$318.84

MILODON Valves, Exhaust, Race, Stainless Steel, 1.74 in. Diameter, Mopar, Big Block, 383 - 440, Set of 8

MILODON Valves, Exhaust, Race, Stainless Steel, 1.74 in. Diameter, Mopar, Big Block, 383 - 440, Set of 8

$440.39

Manley Valve, TI BAE TA1, 1.925 +.100, Set of 8

Manley Valve, TI BAE TA1, 1.925 +.100, Set of 8

$2,550.76

MANLEY Valve, Severe Duty, Intake, 2.3 in. Head Dia, 0.311 in. Stem Dia, 5.594 in. Length, For Chevrolet BB, Each

MANLEY Valve, Severe Duty, Intake, 2.3 in. Head Dia, 0.311 in. Stem Dia, 5.594 in. Length, For Chevrolet BB, Each

$78.54