Performance Valvetrain

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.

PAC Racing Springs PAC-KS16 valve spring kit. Features dual spring, 392 lb/in rate, 1.020 in coil bind, 1.304 in OD, includes chromoly retainer, locks, Viton seal, steel seat, fits GM LS-Series, ideal for performance builds.

PAC Racing Springs PAC-L8160-16 valve locks. Features 10-degree lock angle, 8 mm valve stem, standard height, steel with black oxide finish, radius groove, set of 16, ideal for performance builds.

PAC Racing Springs PAC-LR8065-16 valve locks. Features 10-degree lock angle, 5/16 in valve stem, -0.050 height, steel with black oxide finish, with lash cap recess, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S121-16 valve spring retainers. Features inside design, 0.060 in thick, 1.270 in OD, 0.520 in ID, 0.640 in spring ID, chromoly, set of 16, ideal for performance builds.