Part Number: 12656875. Application: Designed for select GM 6.2L engines; replaces part numbers 12664891, 12691849. Genuine GM OEM quality. Condition & Part Info. New, unused part for long-lasting performance.
Kwik way to higher compression in gen 4 6.2L std bore . Part are from new gen 5 , 6.2L that appear to only have been production line run for feasibility