do it.
ive just had mine done at Mr Tyre in leics. ( powerflow dealer) who i highly recommend as they have given me an excellent service, got my back box and de cat done there.
really makes your car sound amazing, and there is a definite increase in response and power. Feels great sounds great im chuffed.
got a flange fitment put on so i can easily slip the old cat back in wen its mot time.