PAC Racing Springs Spring Seat 1.270 x .600 x .520 | PAC-S128

PAC Racing Springs PAC-S128-16 valve spring retainers. Features inside design, 0.060 in thick, 1.270 in OD, 0.520 in ID, 0.600 in spring ID, chromoly, 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-S129-16 valve spring retainers. Features inside design, 0.060 in thick, 1.270 in OD, 0.520 in ID, 0.680 in spring ID, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S111-16 valve spring retainers. Features inside design, 0.060 in thick, 1.270 in OD, 0.570 in ID, 0.870 in spring ID, chromoly, set of 16, ideal for performance builds.

PAC Racing Springs PAC-S136-16 valve spring retainers. Features inside design, 0.030 in thick, 1.270 in OD, 0.510 in ID, 0.680 in spring ID, chromoly, set of 16, ideal for performance builds with RPM...