I am looking at a used Bassani 4699-3 X pipe with 6K miles on it in like new condition for a real good price. If I install this on my Bullitt am I going have grief from the dealer if anything goes wrong with my engine? Also, will I get a check engine light with the Hi Flow Cats on the Bassani? The stock H pipe looks pretty restrictive with 4 cats. I am wondering if the computer code has enough bandwidth to deal with the change. Thanks.