Performance Valvetrain

PAC Racing Springs PAC-R408-16 valve spring retainers. Features 400 Series, 10-degree lock angle, 1.040 in/0.715 in OD steps, dual spring compatible, titanium, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8137-16 valve locks. Features mini 8-degree lock angle, 5/16 in valve stem, standard height, steel with black oxide finish, square groove, set of 16, ideal for performance builds.

PAC Racing Springs PAC-LR8028-16 valve locks. Features 10-degree lock angle, 11/32 in valve stem, standard height, steel with black oxide finish, +0.050 installed height, recess lock style, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S126-16 valve spring retainers. Features inside design, 0.060 in thick, 1.500 in OD, 0.630 in ID, 0.715 in spring ID, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-KS93 valve spring shim kit. Features 0.015/0.020/0.030/0.050 in thick shims, 1.250 in OD, 0.570 in ID, steel, ideal for precise valve spring adjustments in performance builds.

PAC Racing Springs PAC-1205X-16 valve springs. Features RPM Series dual spring design, 392 lb/in rate, 1.000 in coil bind, 1.304 in OD, fits GM LS-Series, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8088-16 valve locks. Features 7-degree lock angle, 7 mm valve stem, +0.050 height, 3 radius groove, steel with black oxide finish, lash cap recess, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8025 valve lock. Features 10-degree lock angle, 11/32 in valve stem, -0.050 height, steel with black oxide finish, each, ideal for performance builds.

PAC Racing Springs PAC-R401-16 valve spring retainers. Features 400 Series, 10-degree lock angle, 1.185 in/0.865 in/0.635 in OD steps, triple spring compatible, titanium, +0.050 height, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S138-16 valve spring retainers. Features inside design, 0.060 in thick, 1.270 in OD, 0.575 in ID, 0.615 in spring ID, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-1219 valve spring. Features 1200 Series ovate beehive design, 340 lb/in rate, 1.100 in coil bind, 1.307 in OD, fits GM LS-Series, each, ideal for performance builds.

PAC Racing Springs PAC-L8117-16 valve locks. Features 8-degree lock angle, 8 mm valve stem, standard height, titanium with natural finish, radius groove, set of 16, ideal for performance builds.