Well
Yeah a 100/200 cell sport cat With Downpipe Is Around the £320ish mark..(Milltek,BF Ect)
My Leon downpipe was £110 And fitted straight on, I aint too sure if my downpipe was 3'' or 2.75 i aint sure(Never Measured it)
I have a 2.75 decat which goes in to a 2.5 milltek system and ive had the rear silencer Chopped out...And sometimes i do get (what people would say Engine Noise) through the exhaust...
But my god when its Warmed up and on Boost the noise is so F**King Nice and the pop and bang it lets off it uber loud...
Put im going to be eiher A) Gettin a 200cell race cat of the net for £100 and then get my Exhaust place to make some flanges for me to swap over...Simple..
OR
B) selling my Full system and getting a Full BF system...
Just depends if u like faffing about...