Hi, i know you posted up for a kit but i've got a topmount T4 flanged, twin port topmount Greddy exhaust, with intergral external wastegate pipe. Its good for 650+bhp and 10,000rpm. Had this on my old engine that had a forged internals, but have the same one on my current standard engine and im making 549bhp. it has had a small split professionally welded and is good to go. These are £1,100 + vat new but willing to take a sensible offer. Can send pics via E-mail or mobile if you want.
Regards, The Freak