Thanks 7WOTW, interesting that it didn't impact power and actually increased torque, I'm surprised at that. However, in truth (as daft as this may sound) my main reason for changing to the dome is driven by aesthetics and the desire for a bit more induction noise more than performance (I had thought that performance would just be a nice by product). Out of interest, do you have the 90mm trumpets? What size filter do you have on the end of the box as the one I have won't fit right at the end of the box (the cone end is too big)