Buddy of mine wants to put a turbo on his 2v, I told him to check out the newer On3 kits to see if they are worth a damn. I've seen a lot of good reviews about the recent kits. But he said he wants to build a kit using better parts. My question is where should he go to buy the cold side and hot side? I found the MMR hotside which he liked but nothing on the cold side yet.. Would you recommend the newer On3 or build your own? I think he's shooting for 5-600rwhp. What turbo would you guys use?