speedbuggy67 - basically if you run the turbo-back, the only type of warranty they can void is your emissions equipment (ie: original cats etc). Otherwise, a dealership cannot void your warranty (only SOA). As well, if you do run into problems, they must prove that it was the turbo-back which caused the problem. You must keep in mind that the turbo-back will not increase boost, only a boost controller can do that.
WRXThis is a Race Spec Brullen turbo-back on his WRX, and had warranty work done on his car no probs.
Up here in Canada, it's ok. Again, they must prove it was the part you added that caused the problem.