If no other mods are done to the engine system, then there is not much if anything to gain performance wise. As a component in an engine system that has many other modifications done, a KN or similar filter is very likely your only option.
I'm running one on a highly modified 2 liter 4 cylinder turbo engine (400+ wheel HP). It's at ~60k miles and shows no signs of decreased performance or significant wear. I'm kind of surprised that the engine has lasted that long regardless of the type of air filter on it. If I could only keep transmissions in it that long.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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