I wonder why...mine runs fine? I bought one of the first ones '08 #2525 got it July 2 of last year. I took it to atco dragway for Mopar Enthusiast magazine with 150 miles on the clock. Mine ran 13.30 107 in drive, traction control on, no air filter. I will tell you this When I shifted my automatic at 6200 it wouldn't run out of the 50's it shifts at 5800 by itself and that's where it ran its best. I have since added a exhaust (probably removed 100 lbs!) but never got back to the track with it. It only has 570 miles on it now so i don't know if the performance drops off in time but it still puts a smile on my face for 4k lbs.