Performance Valvetrain

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.

PAC Racing Springs PAC-L8028-16 valve locks. Features 10-degree lock angle, 11/32 in valve stem, standard height, steel with black oxide finish, radius groove type, set of 16, ideal for performance builds.

PAC Racing Springs PAC-1248-16 – 1200 Series Drag Race Triple Valve Springs Upgrade your engine with PAC Racing’s 1200 Series Drag Race triple valve springs, designed for high-performance drag racing applications. These springs deliver...

PAC Racing Springs PAC-R658-16 valve spring retainers. Features 600 Series, 8-degree lock angle, 1.120 in/0.715 in OD steps, 1.450 in OD, dual spring compatible, Pacaloy steel, set of 16, ideal for performance builds.

PAC Racing Springs PAC-1224-16 valve springs. Features 1200 Series Drag Race dual spring design, 629 lb/in rate, 1.100 in coil bind, 1.625 in OD, set of 16, ideal for drag racing applications.

PAC Racing Springs PAC-R650-16 valve spring retainers. Features 600 Series, mini 8-degree lock angle, 0.940 in/0.685 in OD steps, 1.250 in OD, dual spring compatible, steel with natural finish, set of 16, ideal for performance builds.

PAC Racing Springs PAC-KS94 valve spring shim kit. Features 0.015/0.020/0.030/0.050 in thick shims, 1.500 in OD, 0.570 in ID, steel, 64 pieces, ideal for precise valve spring adjustments in performance builds.