High Lift Premium Springs, Locks, and Retainers Kit: 1988-1997 EFI 460

We have tested hundreds of combinations of springs, locks, and retainers to develop our premium spring kits. In collaboration with Howards Cams, we’ve assembled a second configuration designed specifically for higher lift applications.

This kit features our high-lift premium springs, along with a positive offset 10-degree lock set and matched retainers. This combination increases available lift clearance, providing approximately an additional .120″ between the retainer and valve seal—making it well-suited for more aggressive cam profiles.

This setup is compatible with our original three camshafts, as well as our new line of high-lift cams. It can also be used with lower lift cams when paired with higher ratio roller rockers. As always, we recommend verifying clearances during installation, particularly with E7 heads, which can sometimes have slightly reduced clearance.

These springs provide a minimum of 115 lbs of seat pressure while maintaining the same open pressure as our original kit. The key advantage is their capability to support up to .650″ lift. We have successfully broken in Howards cams using this setup and have consistently maintained proper “over-the-nose” pressure without cam issues.

$260.00