Quote: i'v tried this on a chassis dyno once. removed a 14x3 k&n and lost 2hp. put it on and gained it back.
i bet you didnt rejet either........ ok why dont all these engine builders out there use air cleaners when they are dynoing motors if it gonna make more power?in certain competitions its actually a restriction when told they have to run air cleaners and mufflers......so in theory motors should make more power with mufflers then too
