Performance Valvetrain

PAC Racing Springs PAC-S187-16 valve spring shims. Features 0.015 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-S188-16 valve spring shims. Features 0.050 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-R315-16 valve spring retainers. Features 300 Series, 10-degree lock angle, 1.110 in/0.710 in OD steps, dual spring compatible, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S128 valve spring locator. Features inside design, 0.060 in thick, 1.270 in OD, 0.520 in ID, 0.600 in spring ID, chromoly, each, ideal for performance builds.

PAC Racing Springs PAC-L8154-16 valve locks. Features 7-degree lock angle, 11/32 in valve stem, standard height, steel with black oxide finish, standard radius groove, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8138-16 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-S112-16 valve spring retainers. Features inside design, 0.060 in thick, 1.450 in OD, 0.570 in ID, 0.980 in spring ID, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8155-16 valve locks. Features 7-degree lock angle, 11/32 in valve stem, +0.050 height, steel with black oxide finish, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R608-16 valve spring retainers. Features 600 Series, 10-degree lock angle, 1.040 in/0.715 in OD steps, dual spring compatible, Pacaloy steel, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R606-16 valve spring retainers. Features 600 Series, 10-degree lock angle, 1.090 in/0.695 in OD steps, dual spring compatible, Pacaloy steel, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R316-16 valve spring retainers. Features 300 Series, 7-degree lock angle, 0.880 in/0.640 in OD steps, 1.235 in OD, dual spring compatible, chromoly, fits GM LS7, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8056-16 valve locks. Features 8-degree lock angle, 5/16 in valve stem, standard height, titanium with natural finish, radius groove, set of 16, ideal for performance builds.