Lower Fuel Injector Insulator Seals for Nissan Frontier Xterra 16636-0B010

Set of six (6) fuel rail lower cushion seal rings (aka lower insulator) for Nissan Frontier, Quest & Xterra 3.3L V6 from 1999 thru 2004. - see table below. This lower insulator is located between the fuel injector and the cylinder head.