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What first 04 A4
I was doing a bunch of reading around but I couldn't really find what I was looking for.
So far my car has a K&N filter, and some mufflers (look like mangaflow) welded on to the stock pipes. What I'm tring to find out is, whats the biggest bottleneck on an 04 A4, if there is such a thing.
I read that most people say to start with headers on most of the GTO's but with the exhaust different on an 04 is it more restrictive in a spot besides the headers?
Then headers and a tune, so does that mean I need a hand held device for the tune or can some shops just reflash the computer?
Most of the post I find are just about mufflers or the 05-06 GTO's.
Thanks.
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