The filters that the post is referring to is the air filters and there is NO carbon filters. Do not, and I repeat DO NOT try to take the air filters out for more power because it will damage the motor. I know it sounds stupid but stupid is what stupid hears and ppl have made this mistake. I have taken them out on my M5 but thats a different story. Drop in filters are a really good mod, bang for the buck deal. Afe or K&N filters would be good for who is considering them. GL

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" Despite its supercar attributes, the M5 still doubles as a soberly practical, spacious saloon - only with the ability to scare four passengers in comfort all the way to the local coronary unit". Top Gear