I recently had a full s/s custom exhaust system fitted to the car, i realised that the back box was much smaller than the normal size ( i.e small cylinder shape kind of thing instead of being a large rectangle one), i had a look on the net and saw that the miltek/supersprint systems had the larger rectangle box, could this smaller box cause me any problems? the car feels a bit slower as in less tourque, i dnt knw if its me or the exhaust' pls help!