Seeing as alot of aftermarket systems still use the standard and restrictive rear manifold I wondered if anyone has looked into getting an aftermarket version made up?

Would it be worth the hassle and is there really much to be gained from doing it?

Any opinions?

apart from the weight saving i don't thing there would be much exhaust gas flow to be gained after all they are two lenghts of straight pipe, but they weight a ton so a lighter version would be good but the costs would probably be crippling