1JZ 2JZ Billet Main CapsIntroducing the new Real Street Billet Steel Main Caps for the 2JZ. Our main caps are held to tighter tolerances than others on the market and as such require less machine time at the machine shop which can leave to a savings of both time and money. The factory main caps in the 2JZ do an excellent job but as you increase the power the engines make, the billet caps become an increasingly good idea as they have more material to deal with the abuse that