dont get a 2jz rotating assembly... its a good way to pop your head and fuck it up hardcore....theneil said:i need either one. my 1jz bottom end was scrap . it came with a rod knock . i now need a new bottom end for my supra asap!!! if anybody reads this and can help me out on the cheap then hook me up. 1jz or 2jz bottom end is welcome thanx guys.