JE Pistons Ultra Series pistons for sport compact and euro applications combine all of the best, most desirable piston features, such as thermal barrier crown coating, lateral gas ports, thick-wall wrist pins, and a revolutionary new forging technology for the ultimate in strength. Premium, gas-nitrided carbon steel rings are included. JE Ultra, Toyota, 2JZ-GTE, 3.406 in. Bore, 9.00:1, Inverted Dome/Dish, 6 Cyl. Piston Kit Toyota 2JZ-GTE/2JZ-GE