Yesterday I fitted a sports exhaust to my e36 316i compact, it runs from the cat back. I wasn't expecting any performance gain really, just needed a new exhaust, but the car actually feels slower and less willing/eager.
I can't find any leaks, does anyone know why this has happened and how I can restore the lost performance?
Do I need a K&N type cone filter or should I chip/remap it now?
The old standard exhaust was shot, so can't really put that back. Im not looking for more power, just to restore the lost power, the car used to be nippy and free reving. I've looked all over the net and some people think you need the back pressure of the stock exhaust for full power and some say not.
Any advice would be great, as upto now im really disappointed my new exhaust has made the car slower to drive