Just toodling around various tuners' sites. Racing Dynamics is marketing a whole-hog system, 505 HP / 465 TQ for $42,600. I suspect it's Nowack's stuff...?
BUT they also offer a 454 HP / 391 TQ kit for $10,900!
Part Number 140 62 39 501
POWER SYSTEM R50S (v.1A)
454HP 391lb-ft E39 [S62 B50] M5
"The Power System is the entry-level performance package. It consists of Sport Camshafts, Dual Sport Exhaust, ECU reprogramming, and intake."
http://www.racdyn.com/LocalizedConte...p?VehicleID=91
This is almost tempting, for crying out loud...it's halfway to 500 horse for a quarter the price...
Anyone got this?!
Alps!