sup ppl, im just wondering if i could change my existing exhaust w/ a diff. one and my current exhaust rite now is a greddy evo. im planning to change just the muffler and still use the piping of it. Will i run into any problems or i'll be ok . The muffler i want to replace it w/ a magnaflow exhuast:



Also how about if i take out the axel back of the evo and get a custom piping for a dual exhuast.