I'm looking for some headers and downpipes on my a4 but i cant seem to find any. I got a magnaflow setup now but it isn't loud enough for my needs lol and neither is it flowing enough air. Any help is welcome.

dont bother buying headers unless your going to buy a set which are like £1000+ the stock ones flow more then enough with a little porting, as for down pipe and decat im going for this,
eBay - The UK's Online Marketplace

does that downpipe fit my 2003 a4?

i dont see why it wouldnt, basicly the same car underneth