Well, you should have not told your dealer...speedhawaii said:sorry i have to drop out. my dealer said for warranty reasons. good luck for everyone buying it this is a great deal.
I believe that any modifications to the exhaust would only void warranty on your exhaust system and possibly your emissions, thats if they could prove that the mod changed your emmision levels. Mazda dealers, from dealer to dealer have different policies and opinions.
Don't tell them s***, and if you have problems, put your old parts back on and drive in. Really, what is going to happen because you allowed the turbo to breath better and got a few extra ponies at the crank?
IMHO, this sounds like a great mod without tampering with your cats and emmision settings. I look forward to a final price, tests and the eventual GB.