No, it has been done from the cat back, but if i were to upgrade the turbo i would put a siamese downpipe in at same time, while the turbo was off. Only other mods are Turbosmart bov, boost gauge, 17's and springs. I also have an HKS pod filter and a stainless intake pipe waiting to go on but I'm just waiting until i buy some material to make a cold air box out of before it all goes in