This is hard I know.. but best exaust or way to make fabia mk1 vrs tdi sound

Use the search mate. It's been covered very recently and you'll find plenty of info that you want.

For me it's just a decay with the standard system. The only nice sound our cars make is the turbo whistle. So for me I wanted to promote that. Changing the cat back will only make it diesely.

Yeah I want like a whistle or almost like a owl noise lol

Just do this every time you change gear.

Haha lol