I ended up going down to a highly recomended muffler shop not ot far away from home and got a 2.4inch cat back system fitted, Whilst it was sounding nice and loud with out the muffler, was not a fan of the slight smell of fumes when idling or warming up.
Is a little bit quieter then with out the muffler but i recon it sounds a hell of allot better, the note it makes is really good, especially when you back off the throrrle a tad!!
As for performance might just be in the head but i feel like it goes a bit better, dont know why but especially up long step hills i feel like it pulls a bit more!!
If i knew how to upload videos and files so that fit the maximum size i would put up a great video i filled from while driving. Mounted my contour camera ( like go pro) on the rear sub frame! sounds good.