OMFG!!!!!!!! I love it!!!!! Not had much chance to play yet as most of way back was motorway.Did test a few times at a constant 70mph ,no sudden accelerating, which returned an average MPG of 40 -42.2MPG I did, however, immediately notice the change in noise.....It's that growl, gargle and spit also noticed the sudden urgency in the car going forward...it basically takes over pmsl heard a few tunes on throttle coming back and how quickly cars in front get closer the noise is simply AWESOME!!!!! My 165,excellent as it was,used to kick nicely in second....I had an unexpected little kick ,driving down my road, in second off the 200 accompanied by an amazing tune After a short fright I simply could not stop laughing off out to play some more in a bit Big thanks to Yellowbadge, who was the main inspiration for this project,and to all the other guy's and gals who helped me to make the right decision