Unless and until somebody does a before and after dyno, it's going to be uncertain how much benefit (if any) the intake provides. I have to admit that I replaced my stock 190E air cleaner with a rubber elbow/tube/K&N cone filter and noticed a few things right away: 1) My MPG remained the same; 2) the engine is more audible now since the stock air cleaner is a great sound damper; and 3) there is a slight increase in throttle response, but nothing to write home (or here) about.