Originally Posted by VCMpower
Hey Andrew, what I found interesting , and it may be engine dynamics, is the HKS is so smooth on the E46 while the rotrex is aggressive. Opposite on the S65. Do you find this as well?
Yes the Rotrex does seem to be on the aggressive side for the e46 m3 when getting into the higher boost ranges. However we do notice a small amount of power down low from the hks on the s54.