b5 1.8t exhaust
#2
thats what i plan on doing but to a Magnaflow 14862 muffler.. you shouldnt have any lights as long as the o2s are in the cat and connected. you might get a little hp increase. i recommend getting a down pipe as well stock is 2" so if u go 2.5 you will open a lot more for better flow and louder sound.
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