Hello, mine made 202 bhp wih 18psi boost, pace chargecooler, mongoose exhaust, -31 actuator, k&n filter and a good setup. Fuelling is fine with MFI and it chatters. Scorpion exhausts were proven to be restrictive on Series 2's. Pace intercoolers can handle about 190 horses, other options have been already mentioned. You need to think long and hard about transmission issues. Most of the series 2 people on here have spent many an hour doing gearboxes. I got a stage 1 from www.gearboxman.co.uk and got an ap organic clutch. You also need to consider handling, I got a spax adjustable kit off ebay that was 6 months old for 190 quid which has been spot on round track