So I'm looking to do a custom catback exhaust system into a borla muffler setup. I just need the dimensions of the system as to how long and where the bends are and everything. I'm looking to do a 2.5 inch whole way down. Any have any specs?

 

yea i have an 01' a4 1.8t myself, ive been thinking about what to do for an exhaust but keeping my check engine light off, how much did you pay for the borla muffler? if i would go for the same approach as you i would just take it off from the downpipe on and lay it on the table and match it up, let me know what you do, cause i have to figure out what to do myself cause i found my muffler laying on the floor on my way home tonight