hello all i didnt go for race can in the end but i got my hands on a 54mm slip on termi it came of a 2005 model and it has small and big flange at the end like the standard stock so im taking it is a slip on would this fit my 2003 xx9 with stock pipes ,i know i will need to decat etc ,is there an o2sensor that i will need to bypass ,also would it be ok to run on standard ecu with sports filters