I was at the Extreme Motorsport dyno day this morning, had a good run on the dyno, made 323bhp and 308lbft at 21psi (1.5 BAR), everything is spot on with the engine, sounded great on the dyno with some nice pops and bangs. I thought I had the boost set up at 1.7 BAR but since changing the air filter to a K&N from the Quikshift, boost seems to have dropped to 1.5 BAR? I got rid of the Quikshift filter as I read that they don't filter down well enough and dirt getting through the steel mesh will eventually blow your engine. Easy enough fix though, will adjust it back up to 1.7 BAR. 323bhp is still good for only 21psi, pretty much exactly what Backdraft rate this kit at - 325bhp. I'm not disappointed with the figures, quite happy really - the engine is healthy, it pulls hard on the road right to the redline, traction is still good too and some scope for improvement/increase is still there. Later this year I will most likely upgrade to a 2868 or 2871R for a bit more oomph!