Hello all,

Ive noticed since I have got my 2.5 turbo back exhaust my 1.9 doesnt peak at 19psi as it did before and now im lucky if I get 12 or 14psi peak.

I have a Oettinger tune, Seat intake, provent and the exhaust are the only engine mods I have made. Could this be the tune not using the exhaust to full effect? Would I need to look at a custom tune to get full effect from the exhaust?

Thanks in advance