PAC Racing Springs PAC-R541-16 valve spring retainers. Features 500 Series, 8-degree lock angle, 1.090 in/0.695 in OD steps, dual spring compatible, titanium, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R553-16 valve spring retainers. Features 500 Series, 8-degree lock angle, 1.070 in/0.750 in OD steps, 1.440 in OD, dual spring compatible, titanium, set of 16, ideal for...

PAC Racing Springs PAC-R619-16 valve spring retainers. Features 600 Series, 8-degree lock angle, 1.140 in/0.735 in OD steps, 1.450 in OD, dual spring compatible, Pacaloy steel, set of 16, ideal for...

PAC Racing Springs PAC-R641-16 valve spring retainers. Features 600 Series, 8-degree lock angle, 1.090 in/0.695 in OD steps, dual spring compatible, tool steel, set of 16, ideal for performance...

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...

PAC Racing Springs PAC-R464-16 valve spring retainers. Features 400 Series, 0.795 in/0.517 in OD steps, single spring compatible, titanium, fits Ford Modular, set of 16, ideal for performance builds.

PAC Racing Springs PAC-R312-16 valve spring retainers. Features 300 Series, 7-degree lock angle, 0.570 in OD step, beehive spring compatible, chromoly, fits Ford Modular, set of 16, ideal for...

PAC Racing Springs PAC-R311-16 valve spring retainers. Features 300 Series, 7-degree lock angle, 0.640 in OD step, beehive spring compatible, chromoly, fits GM LS-Series, set of 16, ideal for...

PAC Racing Springs PAC-R335-16 valve spring retainers. Features 300 Series, 7-degree lock angle, 0.940 in/0.680 in OD steps, 1.300 in OD, dual spring compatible, chromoly, fits GM LS-Series, set of...

PAC Racing Springs PAC-R355-16 valve spring retainers. Features 300 Series, 7-degree lock angle, 0.920 in/0.650 in OD steps, 1.280 in OD, dual spring compatible, chromoly, fits GM LS-Series, set of...

PAC Racing Springs PAC-R435-16 valve spring retainers. Features 400 Series, 7-degree lock angle, 0.940 in/0.680 in/0.680 in OD steps, dual spring compatible, titanium, fits GM LS-Series dual springs,...

PAC Racing Springs PAC-R455-16 valve spring retainers. Features 400 Series, 7-degree lock angle, 0.920 in/0.650 in OD steps, dual spring compatible, titanium, fits GM LS-Series, set of 16, ideal for...