As above really, you wont really see much difference just from a Cat Back, just more 'Burble' depending on what you go for.
Most Cat Backs are advertized as +10 BHP, but in the real world, you wouldnt even notice that.
Ive a BNIB SS centre section that will remove the resonator in the middle, just before the back box. Yours for £40 if you want.
