Manley Lightweight Dual Drag Race Valve Springs 221420-1 SPRING

SKU: MAN221420-1

Valve Springs

Manley Performance

Manley Lightweight Dual Drag Race Valve Springs 221420-1 SPRING

SKU: MAN221420-1

Valve Springs

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Description

Manley lightweight dual drag race valve springs offer exceptional strength and performance, while reducing weight and promoting higher revs. These springs are manufactured from super-clean, high-tensile chrome silicon steel and are shot-peened to MIL specs for maximum fatigue life. They feature proprietary, multi-step heat-treating that minimizes load loss and have computer-aided modeling to minimize valve bounce and valve gear separation. Manley valve springs are smaller in diameter with a lightweight dual design, allowing engines to rev higher faster, and with better valvetrain control. An extended tip thickness is designed to eliminate overload breakage, and their tightly controlled open-end flatness reduces valve stem side loading. It's amazing to think that a tenth of a second can make any difference, but racers win or lose sometimes by thousandths. Manley lightweight dual drag race valve springs will add strength, while reducing weight and times.

Part Type

Valve Springs

Data: v4.2 - Upd: 2026-10-14 10:09:08

Specifications

Product Attributes - Brand: Manley
Product Attributes - Manufacturer's Part Number: 221420-1
Product Attributes - Part Type: Valve Springs
Product Attributes - Product Line: Manley Lightweight Dual Drag Race Valve Springs
Product Attributes - UPC: 807298082080
Product Attributes - Valve Spring Style: Standard
Product Attributes - Number of Springs Per Valve: Dual
Product Attributes - Maximum Valve Lift (in.): 0.850 in.
Product Attributes - Retainers Included: No
Product Attributes - Outside Diameter of Outer Spring (in.): 1.500 in.
Product Attributes - Coil Bind Height (in.): 1.130 in.
Product Attributes - Damper Spring Included: No
Product Attributes - Spring Rate (lbs./in.): 780 lbs./in.
Product Attributes - Inside Diameter of Outer Spring (in.): 1.050 in.
Product Attributes - Inside Diameter of Inner Spring (in.): 0.710 in.
Product Attributes - Locks Included: No
Product Attributes - Valve Stem Seals Included: No
Product Attributes - Valve Springs Coated: No
Product Attributes - Remanufactured: No
Product Attributes - Quantity: Sold individually.
Product Attributes - Notes: Valve springs are super finished.