Performance Valvetrain

PAC Racing Springs PAC-S104-16 valve spring retainers. Features inside design, 0.060 in thick, 1.550 in OD, 0.635 in ID, 0.770 in spring ID, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R363-16 valve spring retainers. Features 300 Series, 7-degree lock angle, 0.640 in OD step, beehive spring compatible, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S191-16 valve spring shims. Features 0.015 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-R432-16 valve spring retainers. Features 400 Series, mini 8-degree lock angle, 0.890 in/0.600 in OD steps, dual spring compatible, titanium, fits LS springs PAC-1530 & PAC-1335, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R504-16 valve spring retainers. Features 500 Series, 10-degree lock angle, 1.165 in/0.840 in OD steps, dual spring compatible, titanium, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8140-16 valve locks. Features mini 8-degree lock angle, 7 mm valve stem, top lock, titanium with natural finish, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R508 valve spring retainer. Features 500 Series, 10-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-R313-16 valve spring retainers. Features 300 Series, 10-degree lock angle, 0.721 in OD step, beehive spring compatible, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-L8131-16 valve locks. Features 8-degree lock angle, 11/32 in valve stem, standard height, steel with black oxide finish, radius groove, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R540-16 valve spring retainers. Features 500 Series, 8-degree lock angle, 1.080 in/0.770 in OD steps, dual spring compatible, titanium, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R632 valve spring retainer. Features 600 Series, mini 8-degree lock angle, 0.890 in/0.600 in OD steps, 1.250 in OD, dual spring compatible, Pacaloy steel, each, ideal for performance builds.