|
What did your friend do to the Mustang GT. He would need a lot of work to be able to keep up with Porsche 911 Turbo. What is his 0-60 and 1/4 mile time? You have to remember E46 M3 is highly tuned by BMW already. Changing exhuast and header does not void the whole warranty. It only voids the warranty of the parts you changed. For example later your engine breaks down. If it break down because you changed the header then your warranty is void. If it isn't because of what you changed then your warranty is in tact.
|