I have posted this on honda-tech before. but just to make it clear. so my and my friends bro where talking today about turbos because I just got a t25 off ebay and after i tould him that he said O you no you need a weleder to weled the down pipe. and I said no I don't think you have to. and he said yes you do I am positive. so now I need to make it clear with my self do I or do I not need to weled the down pipe. thanks for any responds.