Pat_986 said:Ive got a powerflow cat back system, i'm happy with it, it has the same size b/box as my mates valver but i think my pipe diameter is slightly larger.
When i had the de-cat on it poped all the time, whitch sounded cool, But come MOT time obviously i put the cat back on, and decided to leave it on, I couldnt notice any difference in performance with cat/de cat.
But yes powerflow are good because you can specify exsactly what you want, just make sure you check all the welds before you pay!