hey what are some mods i can do to the exhaust besides u bend delete and flowmasters without failing emissions?

 

what engine? you can do headers. run 2.5" pipe from the cat back. a new down pipe...good idea to do this if you get headers. you could talk to a local shop, cause you might be able to run 2 high flow cats inline and get it to pass emissions that way too.

i would recomend a exhaust cutout, but in most states that require testing cutouts are illegal.