Performance Valvetrain

PAC Racing Springs PAC-R408 valve spring retainer. Features 400 Series, 10-degree lock angle, 1.040 in/0.715 in OD steps, 1.050 in OD, dual spring compatible, titanium, each, ideal for performance builds.

PAC Racing Springs PAC-L8046-16 valve locks. Features 10-degree lock angle, 5/16 in valve stem, -0.050 height, titanium with natural finish, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8141-16 valve locks. Features mini 8-degree lock angle, 8 mm valve stem, standard height, steel with black oxide finish, fits GM LS-Series, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S185-16 valve spring shims. Features 0.030 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-LR8027-16 valve locks. Features 10-degree lock angle, 11/32 in valve stem, standard height, steel with black oxide finish, recess lock style, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8076-16 valve locks. Features 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-R509 valve spring retainer. Features 500 Series, 8-degree lock angle, 1.040 in/0.715 in OD steps, 1.365 in OD, dual spring compatible, titanium, each, ideal for performance builds.

PAC Racing Springs PAC-S189-16 valve spring shims. Features 0.030 in thick, 1.250 in OD, 0.570 in ID, steel, set of 16, ideal for precise valve spring adjustments in performance builds.

PAC Racing Springs PAC-L8027-16 valve locks. Features 10-degree lock angle, 11/32 in valve stem, standard height, steel with natural finish, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R455-16 valve spring retainers. Features 400 Series, 7-degree lock angle, 0.920 in/0.650 in OD steps, dual spring compatible, titanium, fits GM LS-Series, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R394-16 valve spring retainers. Features 300 Series, 7-degree lock angle, 0.642 in OD steps, beehive spring compatible, chromoly, -0.100 spring install height, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8065-16 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.