ATS 13-15 Fuel Injector; 3.6L, Federal emissions (opt NT7). IMPALA 12-13 Fuel Injector; California emissions, opt NU5. IMPALA 12-13 Fuel Injector; Federal emissions (opt NT7). IMPALA 14 Fuel Injector; VIN 1 (4th digit, New Style), 3.6L, California emissions, opt NU1.
