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

AFR Valve, SBC Street, 1 pc. chrome stem, swirl polished, 1.600 Std - Custom

AFR Valve, SBC Street, 1 pc. chrome stem, swirl polished, 1.600 Std - Custom

$52.87

Sonnax Oversized Clutch Holding Valve Kit, Chrysler, Ch 845Re, ZF8Hp45/55/70, Each

Sonnax Oversized Clutch Holding Valve Kit, Chrysler, Ch 845Re, ZF8Hp45/55/70, Each

$38.73

MANLEY Valve, Severe Duty, Intake, 2.25 in. Head Dia, 0.3415 in. Stem Dia, 5.494 in. Length, Set of 8

MANLEY Valve, Severe Duty, Intake, 2.25 in. Head Dia, 0.3415 in. Stem Dia, 5.494 in. Length, Set of 8

$607.34

Sonnax Oversized Secondary Pulley Control Valve Kit, Jatco JF010E (Re0F09A/Re0F09B), Each

Sonnax Oversized Secondary Pulley Control Valve Kit, Jatco JF010E (Re0F09A/Re0F09B), Each

$70.06

MILODON Valve, Exhaust, Race, Stainless Steel, 1.74 in. Diameter, Mopar, Big Block, 383 - 440, Each

MILODON Valve, Exhaust, Race, Stainless Steel, 1.74 in. Diameter, Mopar, Big Block, 383 - 440, Each

$59.96

MANLEY Valve, Race Master, Exhaust, 1.675 in. Head Dia, 0.3125 in. Stem Dia, 5.3 in. Length, Gen II, Each

MANLEY Valve, Race Master, Exhaust, 1.675 in. Head Dia, 0.3125 in. Stem Dia, 5.3 in. Length, Gen II, Each

$72.68