Compatible with Supertech RET-K20A2/T2 titanium retainers and SEAT-H1020DS seat locators. 16x Supertech Dual Valve Springs (SPR-H1021D) — inner and outer pairs. With a 13.2 lbs/mm spring rate, this set is the moderate-pressure option in the SPR-H1019D/H1021D/H1022D lineup — ideal for builds where OEM springs fall short but maximum-pressure springs aren't required.
