Cheers bud, I think it's a great sound, funking loud though. The sportex b-pipe cost £60 delivered, and the M2 back boxes go for £156. It's a pretty cheap system, but I've been impressed with the quality of it. I think I'll replace the mild steel b-pipe with a custom stainless one when funds allow, perhaps with a small silencer to take the edge off the volume, I really don't want to lose the overrun burble though! With the bung in the voulme is pretty sensible, but I don't like the noise, sounds like a sport pretending to be a type-r....