https://www.pistonheads.com/gassing/topic.asp?h=0&f=57&t=302977
The pictures don't work anymore but it does give the gains in the results and conclusion. With the M3 CSL the difference was over 40bhp using 99RON which is a pretty massive difference! I suppose it depends entirely if your car is designed for it but if it is then it's worth getting.
The pictures don't work anymore but it does give the gains in the results and conclusion. With the M3 CSL the difference was over 40bhp using 99RON which is a pretty massive difference! I suppose it depends entirely if your car is designed for it but if it is then it's worth getting.