Performance Valvetrain

PAC Racing Springs PAC-R541-16 valve spring retainers. Features 500 Series, 8-degree lock angle, 1.090 in/0.695 in OD steps, dual spring compatible, titanium, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8064-16 valve locks. Features 10-degree lock angle, 5/16 in valve stem, -0.050 height, steel with black oxide finish, set of 16, ideal for performance builds.

PAC Racing Springs PAC-KS12 valve spring kit. Features Hot Rod Series dual spring, 392 lb/in rate, 1.020 in coil bind, 1.034 in OD, includes chromoly retainers, locks, Viton seals, seat, fits GM LS-Series, set of 16.

PAC Racing Springs PAC-L8136-16 valve locks. Features mini 8-degree lock angle, 5/16 in valve stem, +0.050 height, steel with black oxide finish, set of 16, ideal for performance builds.

PAC Racing Springs PAC-KS14 valve spring kit. Features beehive spring, 313 lb/in rate, 1.140 in coil bind, 1.290 in OD, includes chromoly retainer, locks, Viton seal, seat, fits GM LS-Series, ideal for performance builds.

PAC Racing Springs PAC-L8006-16 valve locks. Features 10-degree lock angle, 11/32 in valve stem, -0.050 height, titanium with natural finish, radius groove, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R349-16 valve spring retainers. Features 300 Series, 8-degree lock angle, 0.775 in OD step, single spring compatible, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S184-16 valve spring shims. Features 0.050 in thick, 1.500 in OD, 0.570 in ID, steel, set of 16, ideal for precise valve spring adjustments in performance builds.

PAC Racing Springs PAC-L8133-16 valve locks. Features mini 8-degree lock angle, 11/32 in valve stem, standard height, steel with black oxide finish, square groove, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R405-16 valve spring retainers. Features 400 Series, 10-degree lock angle, 1.090 in/0.780 in OD steps, dual spring compatible, titanium, +0.050 height, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S133 valve spring locator. Features inside design, 0.030 in thick, 1.650 in OD, 0.570 in ID, 0.630 in spring ID, chromoly, each, ideal for performance builds.

PAC Racing Springs PAC-R515-16 valve spring retainers. Features 500 Series, 10-degree lock angle, 1.110 in/0.710 in OD steps, dual spring compatible, titanium, set of 16, ideal for performance builds.