I will have to agree. The ZR-1 is too much car for the 3.6l M5 in stock, or even chipped, dress. But considering this is a 6 cylinder, 4-door family type car, being only a second behind a "supercar" like the ZR-1 is a compliment in my book. As far as the laundry list of cars that were beaten in one week, I have my doubts on a few of them. I have timed mine at the track, 5.6 0-60, low et of 13.7 @ 103 and high of 14.2 at 99. (bad start). Dinan chip and modified MAF are only mods. Many of the cars listed there have faster times than the ZR-1 in some areas. Sorry, just my opinions.