Downpipes are different parts harder to find not sure about the bov on an auto, but if u just want the turbo sound u gain alot from an intake..try that first it's proly the best mod for the money IMO..people claim that an aftermarket intake does no better performance with stock turbo but I will argue that any car that can breathe better and has better exhaust will run better than stock..buy an intake first watever exhaust parts and anything else u want and then a tune u will be fine on those parts till then..