Hey guys. Thanks for the replys. I'm the friend with the 71. I got moe to ask for me because I couldn't find where uksc went.... The reason I was thinking of 3071 was because people are saying the 2860rs and the 3071 with .63 or smaller housing will respond the same but the 3071 will have more guts. I'm a bit lost with these garretts. So many combos. A guy here in aust had a GT 2860 and a 2871 and says his 2871 was heaps better. Both .63 rears. I was originally going for the 2860 with .63 rear. I don't wanna spend up on the gtx series. Hoping I can grab a bargain as others upgrade and I can cash in on their old ones lol Should also add, I'm running e85 fuel, water meth for inlet temps and 8.6:1 comp ratio.