I am just running the Inlet with a standard exhaust, the car defo drives better than it did before, feels like it comes on boost earlier and holds the power right the way through. I did go from L6 ecu with an off the shelf chip to L8 ecu and live map at the same time.

Standard valve springs, mildly ported head.

The was the car on a DD dyno last year, high and low boost graphs. The boost ppipe blew off on the high boost run due to me splitting one the day before and having to bodge one on for the day.