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Valve Spring, Nex Tek, Dual, 1.324 in. Outside Diameter, 435 lbs/in., Each
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Estimated Ship Date from Ohio: Today Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
221421-1
Part Type:
Product Line:
Summit Racing Part Number:
MAN-221421-1
UPC:
807298082103
Valve Spring Style:
Standard
Number of Springs Per Valve:
Dual
Maximum Valve Lift (in.):
0.800 in.
Retainers Included:
No
Outside Diameter of Outer Spring (in.):
1.324 in.
Coil Bind Height (in.):
0.900 in.
Damper Spring Included:
No
Spring Rate (lbs./in.):
435 lbs./in.
Inside Diameter of Outer Spring (in.):
0.920 in.
Inside Diameter of Inner Spring (in.):
0.676 in.
Locks Included:
No
Valve Stem Seals Included:
No
Valve Springs Coated:
No
Quantity:
Sold individually.
Notes:
Valve springs are fully polished.
Make:
CHEVROLET
Engine Family:
Chevy small block Gen III/IV (LS-based engines)
Installed Height (in.):
1.800 in.
Seat Pressure at Installed Height (lbs.):
165 lbs.
Open Height (in.)(application):
1.000
Open Pressure (lbs.):
515 lbs.
Remanufactured:
No
Manley NexTek Valve Springs
These Manley NexTek valve springs are better-designed valve springs using state-of-the-art machinery for purpose-built racing engines. They're 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. The Manley NexTek valve springs are smaller diameter and lightweight, allowing engines to rev higher faster. They have an extended tip thickness designed to eliminate overload breakage, and their tightly controlled open-end flatness reduces valve stem side loading.
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