Audi did a pretty good job with the OEM sports exhaust on the pre-FL. Add some secondary dectas and in my opinion you have a great sound that is actually better than adding a Milltek.
The vid below shows a rev off between my car with OEM sports + secondary decat (white car on left) and a friends car with secondary decat and Milltek cat back system. Note Stock down pipe on either car and both have stage 2 tune.
First revving is the white car with OEM sports & decat followed by orange car with Milltek catback & seondary decat. White car revs again and then Orange car is at the end. They sound a bit mixed up in the timing of the revving but I think you can hear a difference between the two. You can decide which you prefer. (crank the sound up to get the best effect )
If you can get a similar result with decats on the FL car then it should sound ok.
Audi OEM Sports + decat v Milltek.wmv 5.67MB
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Edited by Fivepotfan, 13 October 2017 - 02:32 PM.