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 Flo, Intake, 2.08 in. Head Dia, 0.3415 in. Stem Dia, 5.24 in. Length, SBC, Set of 8

MANLEY Valve, Race Flo, Intake, 2.08 in. Head Dia, 0.3415 in. Stem Dia, 5.24 in. Length, SBC, Set of 8

$380.66

MANLEY Valve, Titanium, Intake, Bead Loc, 2.325 in. Head Dia, 0.3415 in. Stem Dia, 5.5 in. Length, Set of 8

MANLEY Valve, Titanium, Intake, Bead Loc, 2.325 in. Head Dia, 0.3415 in. Stem Dia, 5.5 in. Length, Set of 8

$2,550.76

MILODON Valves, Intake, Race, Stainless Steel, 2.25 in. Dia, +.100 Long, Big For Chevrolet, 396, 427, 454, 502, Set of 8

MILODON Valves, Intake, Race, Stainless Steel, 2.25 in. Dia, +.100 Long, Big For Chevrolet, 396, 427, 454, 502, Set of 8

$507.55

MANLEY Valve, Titanium, Intake, Bead Loc, 2.1 in. Head Dia, 0.311 in. Stem Dia, 5.14 in. Height, Set of 8

MANLEY Valve, Titanium, Intake, Bead Loc, 2.1 in. Head Dia, 0.311 in. Stem Dia, 5.14 in. Height, Set of 8

$3,171.69

MANLEY Valve, Race Master, Intake, 2.02 in. Head Dia, 0.3415 in. Stem Dia, 5.14 in. Length, For Ford, Each

MANLEY Valve, Race Master, Intake, 2.02 in. Head Dia, 0.3415 in. Stem Dia, 5.14 in. Length, For Ford, Each

$47.58

MANLEY Valve, Titanium, Intake, 2.35 in. Head Dia, 0.3415 in. Stem Dia, 5.5 in. Length, Set of 8

MANLEY Valve, Titanium, Intake, 2.35 in. Head Dia, 0.3415 in. Stem Dia, 5.5 in. Length, Set of 8

$2,550.76