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Chevy Big-Block V8 |  Valve Shims, Springs, Retainers, Seals |  3970627

3970627  - Valve Spring

This high performance valve spring has an outer and inner spring; was originally used in the 454 LS6 Chevelle's in the 1970's. Good for mild performance big blocks.

Technical Notes: The dual spring is 1.487" O.D. Diameter and 1.28" solid height. The pressure at installed height is 105# @ 1.88" with 450# the average rate of pound per inch. Use with valve spring retainer P/N 3964264.

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