These Extreme/Severe Duty Gen II custom valves with unmatched strength and superiority are the only valves of their kind. Exhaust material XH-428 and intake material NK-844 are paired together for ultimate dominance over all others. With four times the tensile strength of competitors' intake valves and supremely better fatigue life, Manley Severe Duty Gen II custom valves truly show their commitment to seeing that you're there at the finish. You decide the head diameter and seat and margin widths, as well as valve length, groove type, and location for the perfect custom setup! Image is a representation. Actual product may vary

More From This Category

MANLEY Valve, Titanium, Exhaust, 1.9 in. Head Dia, 0.3415 in. Stem Dia, 6.45 in. Length, For Pontiac, Set of 8

MANLEY Valve, Titanium, Exhaust, 1.9 in. Head Dia, 0.3415 in. Stem Dia, 6.45 in. Length, For Pontiac, Set of 8

$2,550.76

Sonnax Oversized Primary Pulley Reducing Valve Kit, JF016E (Re0F10D), Each

Sonnax Oversized Primary Pulley Reducing Valve Kit, JF016E (Re0F10D), Each

$78.71

MANLEY Valve, Titanium, Intake, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Height, Set of 8

MANLEY Valve, Titanium, Intake, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Height, Set of 8

$2,421.90

MANLEY Valve, Race Master, Exhaust, 1.88 in. Head Dia, 0.3715 in. Stem Dia, 5.522 in. Length, BBC, Each

MANLEY Valve, Race Master, Exhaust, 1.88 in. Head Dia, 0.3715 in. Stem Dia, 5.522 in. Length, BBC, Each

$47.58

MANLEY Valve, Race Master, Exhaust, Bead Loc, 1.575 in. Head Dia, 0.3125 in. Stem Dia, 4.845 in. Length, For Chrysler HEMI, Each

MANLEY Valve, Race Master, Exhaust, Bead Loc, 1.575 in. Head Dia, 0.3125 in. Stem Dia, 4.845 in. Length, For Chrysler HEMI, Each

$50.05

MANLEY Valve, Race Master, Intake, 54.5mm Head Dia, 0.3122 in. Stem Dia, 5.424 Length, For Ford 6.2L, Set of 8

MANLEY Valve, Race Master, Intake, 54.5mm Head Dia, 0.3122 in. Stem Dia, 5.424 Length, For Ford 6.2L, Set of 8

$408.60