Outer Limits 4x4 Board

hey guys got a TB42E and have pacemaker extractors and in a couple of weeks will have a full 2.5" exhaust system straight through with the high flow muffler. was then going to get it dyno tuned. i was just woundering if anyone else has done similar and did they gain any more power or notice a big difference.
thanks.

The differences are there but not huge, you can get a bit more by running premium and optimizing the timing on the dyno.