Atomic - AU Intech Heavy Duty Dual Valve Springs & Retainers - 306810-SKit

This kit is designed to fit late model SOHC Ford cylinder heads fitted with 7mm valve stems. Our dual spring package fits without the need to machine the spring seats and includes chrome moly retainers that accept the stock multi-groove locks.

Tension: 125 lbs at 1.780"

Tension at .500 valve lift: 295 lbs

Recommended for boost levels to 2.3 bar (34 lbs)