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Manley Lightweight Dual Drag Race Valve Springs 221420-16
Part Number: MAN-221420-16
Manley Lightweight Dual Drag Race Valve Springs
Valve Spring, Nex Tek, Dual, 1.500 in. Outside Diameter, 780 lbs/in., Set of 16
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Estimated Ship Date: Oct 27, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
221420-16
Part Type:
Product Line:
Summit Racing Part Number:
MAN-221420-16
UPC:
807298082097
Valve Spring Style:
Standard
Number of Springs Per Valve:
Dual
Maximum Valve Lift (in.):
0.850 in.
Retainers Included:
No
Outside Diameter of Outer Spring (in.):
1.500 in.
Coil Bind Height (in.):
1.130 in.
Damper Spring Included:
No
Spring Rate (lbs./in.):
780 lbs./in.
Inside Diameter of Outer Spring (in.):
1.050 in.
Inside Diameter of Inner Spring (in.):
0.710 in.
Locks Included:
No
Valve Stem Seals Included:
No
Valve Springs Coated:
No
Quantity:
Sold as a set of 16.
Notes:
Valve springs are super finished.
Installed Height (in.):
2.050 in.
Seat Pressure at Installed Height (lbs.):
275 lbs.
Open Height (in.)(application):
1.200
Open Pressure (lbs.):
940 lbs.
Remanufactured:
No
Manley Lightweight Dual Drag Race Valve Springs
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.
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