Hi, I've had my 2010 S4 since October last year (love it - best all round car I've ever had) and I've always had a sneaking suspicion that it wasn't standard. Short of paying for a Dyno run (which I may still have to do...) I've been reading about ways to calculate the power from logging the MAF readings in VCDS, so I started logging the RPM and MAF and did a 1200-redline run in third gear, the peak (in kg/hr) came through as 1236.18 (@ 6613 rpm), which translated to 343.38 g/s, which (apparently) should be divided by 0.8 to give the BHP, which came out as 429bhp. These are the only two runs I've tried so they may not be the best but 429bhp still seems extremely high. What do you think to my logic above? I'm sceptical but I've also read from people who swear by it. Any other tips on how to figure out what it's running? Cheers!