ive heard people bark big numbers... but ive also heard that 398 whp was the most.. i believe that car covered TURBO mag a few months back, well, quite a few months back.. its white...
at the time it was at 376 to the wheels, on stock trans too!
rumor i read was that the car nudged 400 whp, and something went awry, now it has a built motor... needless to say, this is all heresay, if i find documentation, ill be the first to let you know...