Hi Everyone,
So I've had the 06 WRX for a few years now and only drive it on long drives out to the country (not my daily). Lately I feel that it's not as powerful as it use to be, it just feels like it doesn't pull as hard as it use to. In the past month I've been reading about the ringlands issue for the EJ25. The car has the following mods: TBE, vf34 turbo, bigger fuel pump and a Verso tune. It also has about 101,000km on the clock and I service it regularly. Now from what I've read, opening the throttle up in the highest gear(5th) is one of the causes of this issue. Unknown to me before reading this, that what I've been doing when on those long drives. To try and rule out the ringlands issue I was thinking getting a compression test done or getting it back on the dyno at ASG for a power run and compare the results with the original tune results.

Any advice from you guys is greatly appreciated.