Quote Originally Posted by philipminge View Post
fatboyz i have never seen a stock exhaust flow that well with a tune... i must have a shitty tuner.... i'd love to see dyno sheets if you have any?

i feel that the stock exhaust was VERY restrictive.... and the stock cat!... that must go IMO.... run a berk 70mm or if track use just a TP.... thats where you gain some good power... and then if u tune also, you will be surprised...
This was a AP2, are AP1 and AP2 share the same diameter exhaust/mufflers besides the tips?

Stock cat (AP2) was good up too 260kw, so as i said the OEM items flows nicely. Changing the exhaust to 70mm (bigger then OEM) it will gain power on WOT, you will tend to lose some part throttle.