I have installed the BMC Air Filter for my 135LC ES with the code FM624/04. I have wrote a preview of the BMC Air Filter here. BMC Air Filter is a superflow air filter which can maintain 98% of air flowing to your engine. The normal paper air filter can only provide 60-70% air flow to the engine. You can imagine this if you try to breathe with a mask covered with paper. I think you won’t be comfortable inside it. I also have changed the spark plug to NGK G-Power CPR8EAGP-9 Platinum Alloy which have smaller center electrode that provide better spark. Usually the changes of air filter should came with the change of spark plug for better performance. (more…)