Hi, im new to this site. Im a tech for toyota the 2az-fe motor can handle alot of power the block is rated to 400+ horsepower due the cyclinder walls being iron with a plastic block guard(still tryin to figure out y its plastic) and aluminum outer shell. the head is beast like. the biggest problem is the rods kinda suck but if ur pushin those number u gonna do internals. after that u basically need better head gasket and clutch