Go to genie headers (http://genieheaders.com/) they can custom make them and send them to your door..

Myself and 2 mates had them made up..

We had them made up for a12 and A15 they are 42mm primary pipes.. 4-1 headers or can be 4-2 into a join or straight..

let them know how you want it and they can make them up.. great welds run nice fit perfect and sound awesome.. cost me $350.00 delivered