Is there an advantage or disadvantage to bolt on exhaust kits (cat back) or going to a shop and having them make the hole thing? Looks like a shop is cheeper.

 

Bolt together are 99% of the time better designed kits for the best performance. Is it worth the money? I think so.

I have my magnaflow 15281 for sale. It only has 4k miles on it and its $460+ new, im letting it go for 325+shipping.