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PAC Racing 1400 Series Valve Springs PAC-1421-16
Part Number: RSC-PAC-1421-16
PAC Racing 1400 Series Valve Springs
Valve Springs, 1400 Series, Single, 1.305 in. Outside Diameter, 437 lb/in., 0.943 in Inside Diameter, Set of 16
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Estimated Ship Date: Oct 26, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
PAC-1421-16
Part Type:
Product Line:
Summit Racing Part Number:
RSC-PAC-1421-16
Valve Spring Style:
Conical
Number of Springs Per Valve:
Single
Maximum Valve Lift (in.):
0.670 in.
Retainers Included:
No
Outside Diameter of Outer Spring (in.):
1.305 in.
Coil Bind Height (in.):
1.047 in.
Damper Spring Included:
No
Spring Rate (lbs./in.):
437 lbs./in.
Inside Diameter of Outer Spring (in.):
0.943 in.
Locks Included:
No
Valve Stem Seals Included:
No
Valve Springs Coated:
No
Remanufactured:
No
Quantity:
Sold as a set of 16.
Engine Family:
CHEVY SMALL BLOCK GEN III/IV LS V8 GAS
Make:
CHEVROLET
Installed Height (in.):
1.800 in.
Seat Pressure at Installed Height (lbs.):
150 lbs.
Open Height (in.)(application):
1.170
Open Pressure (lbs.):
425 lbs.
PAC Racing 1400 Series Valve Springs
Pushing your valvetrain to the limit? PAC Racing 1400 Series valve springs will outfit your setup with advanced processing technology and highly variable rates to handle your aggressive camshaft. Actually a true conical spring, PAC Racing 1400 Series valve springs feature strong alloy materials and innovative heat-treating methods that will help you achieve leading performance down the dragstrip.
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