Better designed valve springs using state-of-the-art machinery for purpose-built racing engines. Manley Street Master valve springs are manufactured from super-clean, high-tensile chrome silicon steel and are shot-peened to MIL specs for maximum fatigue life. They feature a proprietary multi-step heat-treating that minimizes load loss and have computer-aided modeling to minimize valve bounce and valve gear separation. Manley Street Master valve springs feature a small diameter and are lightweight, allowing engines to rev higher faster. They have an extended tip thickness to eliminate overload breakage and their tightly controlled open-end flatness reduces valve stem side loading.

More From This Category

MANLEY Valve Spring Locator, Inside, Heat-Treated, Fits 1.311 in. OD. Spring, .57 in. ID, 1.29 in. OD, .062 in. Thick, Black, Set of 16

MANLEY Valve Spring Locator, Inside, Heat-Treated, Fits 1.311 in. OD. Spring, .57 in. ID, 1.29 in. OD, .062 in. Thick, Black, Set of 16

$188.60

Trick Flow Valve Spring Retainers, Chromoly Steel, Set of 16

Trick Flow Valve Spring Retainers, Chromoly Steel, Set of 16

$174.73

MANLEY Valve Spring Retainer, Titanium, Super 7 Degree, 1.620 in. OD, Double, Set of 16

MANLEY Valve Spring Retainer, Titanium, Super 7 Degree, 1.620 in. OD, Double, Set of 16

$890.07

COMP Cams VALVE SPRING & TI RETAINER KIT, ZEX

COMP Cams VALVE SPRING & TI RETAINER KIT, ZEX

$1,174.96

COMP Cams Valve Lock, Race, Hardened Steel, Machined, 7 Degree, 8mm Stem, Single Groove, Pair

COMP Cams Valve Lock, Race, Hardened Steel, Machined, 7 Degree, 8mm Stem, Single Groove, Pair

$4.70

MANLEY Valve Spring and Retainer, NexTek, Dual, 8mm Stem Diameter, 10 Degree Lock, 1.311 in. Spring O.D, Kit

MANLEY Valve Spring and Retainer, NexTek, Dual, 8mm Stem Diameter, 10 Degree Lock, 1.311 in. Spring O.D, Kit

$1,508.95