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, Titanium, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.56 in. Height, Each

MANLEY Valve, Titanium, Exhaust, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.56 in. Height, Each

$320.57

Nitto Pistons for Mitsubishi 4G63, Stroker, 2.2L, 86.0MM (+.040"), 22MM Pin, -15cc Dish, Heavy Duty Forging, set

Nitto Pistons for Mitsubishi 4G63, Stroker, 2.2L, 86.0MM (+.040"), 22MM Pin, -15cc Dish, Heavy Duty Forging, set

$1,680.00

ARP Bolts, 8740 Chromoly, Black Oxide, 12-Point Head, 1/2-20 in. Thread, 4.50 in. UHL, Set of 5

ARP Bolts, 8740 Chromoly, Black Oxide, 12-Point Head, 1/2-20 in. Thread, 4.50 in. UHL, Set of 5

$61.68

Main Bearing Set

Main Bearing Set

$79.16

Manley Crankshaft, Chromoly 4340, Chrysler HEMI 5.7/6.1, 4.080 Stroke, Each

Manley Crankshaft, Chromoly 4340, Chrysler HEMI 5.7/6.1, 4.080 Stroke, Each

$2,737.13