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, 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

$49.96

Sonnax Tcc Regulator Valve Kit, GM, 6L45, 6L50, 6L80 Commodore VE-VF 6L80E, 6L90 Commodore VE-VF LSA, Each

Sonnax Tcc Regulator Valve Kit, GM, 6L45, 6L50, 6L80 Commodore VE-VF 6L80E, 6L90 Commodore VE-VF LSA, Each

$92.93

MILODON Valve, Intake, Race, Stainless Steel, 2.05 in. Diameter, +.250 Long, For Chevrolet, Small Block, 350, 383, 400, Each

MILODON Valve, Intake, Race, Stainless Steel, 2.05 in. Diameter, +.250 Long, For Chevrolet, Small Block, 350, 383, 400, Each

$70.07

MANLEY Valve, Severe Duty, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.221 in. Length, SBC, Each

MANLEY Valve, Severe Duty, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.221 in. Length, SBC, Each

$79.73