I have Stage 2 with Neuspeed P-Flo, BCS Powervalve TBE with decat.
seeing as i had my downpipe fitted before the stage 2 mine was a LOT louder on boost after the map. normal driving it feels better, i felt a noticable difference from Stage 1 to stage 2. I was getting 248 on stage 1, standard exhaust, standard air filter.
Stage 2 as above im getting 270.5 BHP
I had mine done by PD Tuning in Sunderland and i have a custom map from Dave. all i can say is