Hi,

I've recently got one. they are about £500 new I think for BB and Centre. You'll notice better low end response, bit of a loss in mid range and much more top end power.
From 4000rpm on, it rocks!

Very loud though. But gorgeous noise. Be prepared to draw more attention than Posh Spice walking naked down the high street!

Rich

 

I might add, that now that you have a three inch mid and back section, you would profit from a three inch twin dump down pipe such as the scoobymani, or the bpm.

 

Just been offered this system, centre pipe and bb for a fairly cheap price, how much is it worth, what are the performance gains like, and honestly what does it sound like? average, loud or rediculous, any help appreciated, cheers