would this go on a standard car ok?

[lol4fun]

Been reading and everyone says a 3in downpipe is needed so I found this:
http://pages.ebay.com/link/?nav=item.view&id=350572858297

Would I be able to bolt that straight onto my car and use the rest of the standard exhaust system? Or would that be pointless as its still being restricted by the standard system?

 

[superkarl]

An A3 yes. An S3 no

 

[lol4fun]

Thanks, would it get any gains when remapped or just move the restriction along to the standard exhaust

 

[lol4fun]

im gonna get shouted at(meant to be saving for a house lol)

just won this:
VW GOLF MK4 1.8T TURBO 20v AUDI A3 1.8T STAINLESS STEEL EXHAUST DECAT DOWNPIPE | eBay