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-S184-16 valve spring shims. Features 0.050 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-3003 throttle return spring. Features 2-1/2 in free length, heavy tension, steel with natural finish, ensures precise throttle control, ideal for performance builds. Sold as...

PAC Racing Springs PAC-3002 throttle return spring. Features 2-1/2 in free length, medium tension, steel with natural finish, ensures precise throttle control, ideal for performance builds. Sold as...

PAC Racing Springs PAC-3005 throttle return spring. Features 3-3/4 in free length, medium tension, steel with natural finish, ensures precise throttle control, ideal for performance builds. Sold as...

PAC Racing Springs PAC-3008 throttle return spring. Features 5 in free length, medium tension, steel with natural finish, ensures precise throttle control, ideal for performance builds. Sold as each.

PAC Racing Springs PAC-1924 valve spring. Features Hot Rod Series dual spring with damper, 431 lb/in rate, 1.125 in coil bind, 1.540 in OD, each, ideal for hot rod performance builds.

PAC Racing Springs PAC-1940 valve spring. Features Hot Rod Series dual spring with damper, 469 lb/in rate, 1.120 in coil bind, 1.555 in OD, each, ideal for hot rod performance builds.

PAC Racing Springs PAC-KS12 valve spring kit. Features Hot Rod Series dual spring, 392 lb/in rate, 1.020 in coil bind, 1.034 in OD, includes chromoly retainers, locks, Viton seals, seat, fits GM...

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...

PAC Racing Springs PAC-R501 valve spring retainer. Features 500 Series, 10-degree lock angle, 1.185 in/0.865 in/0.635 in OD steps, 1.475 in OD, triple spring compatible, titanium, each, ideal for...

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...