270-280whp on 93. people are getting too concerned with numbers. peak numbers are just numbers, you all need to look at the power curves, this determines how the car actually feels on the street. I was up to 280whp on my x37 before I had to take it off, the thing was quick. I took it off for other reasons, not because it wasn't reliable, it probably has about 20k on the turbo, and it looked brand new, very little shaft play if any.