Howards Cams Pro-Alloy Mechanical Roller Valve Springs

5.0 out of 5 stars 1 Customer Reviews

Howards Cams' Pro-Alloy is a specially developed low-stress, high-endurance material. Years of development, experience, and testing have gone into creating these Pro-Alloy mechanical roller valve springs. They have a low fatigue rate compared to most other roller springs on the market. These springs exceed H-11 Vasco-Jet specifications and are cycle-tested to 12 million cycles with no breakage.

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Howards Cams Pro-Alloy Mechanical Roller Valve Springs 98643

Valve Springs, Dual, 1.550 in. Outside Diameter, 508 lbs./in. Rate, 1.080 in. Coil Bind Height, Set of 16

Part Number: HRS-98643

5.0 out of 5 stars ( 1 )

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Howards Cams Pro-Alloy Mechanical Roller Valve Springs 98737

Valve Springs, Dual, 1.625 in. Outside Diameter, 593 lbs./in. Rate, 1.150 in. Coil Bind Height, Set of 16

Part Number: HRS-98737

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Howards Cams Pro-Alloy Mechanical Roller Valve Springs 98737-1

Valve Spring, Dual, 1.625 in. Outside Diameter, 593 lbs./in. Rate, 1.150 in. Coil Bind Height, Each

Part Number: HRS-98737-1

Not Yet Reviewed

Estimated Ship Date: Jun 18, 2026 if ordered today

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Estimated Ship Date: Jun 18, 2026 if ordered today

Howards Cams Pro-Alloy Mechanical Roller Valve Springs 98643-1

Valve Spring, Dual, 1.550 in. Outside Diameter, 508 lbs./in. Rate, 1.080 in. Coil Bind Height, Each

Part Number: HRS-98643-1

Not Yet Reviewed

Estimated Ship Date: Jun 18, 2026 if ordered today

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Estimated Ship Date: Jun 18, 2026 if ordered today

Howards Cams Pro-Alloy Mechanical Roller Valve Springs 98048-1

Valve Spring, Triple, 1.660 in. Outside Diameter, 745 lbs./in. Rate, 1.145 in. Coil Bind Height, Each

Part Number: HRS-98048-1

Not Yet Reviewed

Estimated Ship Date: Jun 19, 2026 if ordered today

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Estimated Ship Date: Jun 19, 2026 if ordered today

Howards Cams Pro-Alloy Mechanical Roller Valve Springs 98049-1

Valve Spring, Triple, 1.660 in. Outside Diameter, 725 lbs./in. Rate, 1.145 in. Coil Bind Height, Each

Part Number: HRS-98049-1

Not Yet Reviewed

Estimated Ship Date: Jun 18, 2026 if ordered today

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Estimated Ship Date: Jun 18, 2026 if ordered today

Howards Cams Pro-Alloy Mechanical Roller Valve Springs 98049

Valve Springs, Triple, 1.660 in. Outside Diameter, 725 lbs./in. Rate, 1.145 in. Coil Bind Height, Set of 16

Part Number: HRS-98049

Not Yet Reviewed

Estimated Ship Date: Jun 18, 2026 if ordered today

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Estimated Ship Date: Jun 18, 2026 if ordered today

Howards Cams Pro-Alloy Mechanical Roller Valve Springs 98738-1A

Valve Spring, Dual, 1.625 in. Outside Diameter, 645 lbs./in. Rate, 1.070 in. Coil Bind Height, Each

Part Number: HRS-98738-1A

Not Yet Reviewed

Estimated Ship Date: Jun 18, 2026 if ordered today

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Estimated Ship Date: Jun 18, 2026 if ordered today

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