K & N air filters for R/C vehicles

[RobH]

Don't use K&N, and MS's are pushing it (unless you have an old style which is still kinda pushing it). MS filters were not designed correctly due to the fact that the front (mesh grill?) that needs to be removed before changing the foam, falls off by itself letting the foam slide out during a race.

The foam doesnt just slide out, it pretty much springs out. It happened to me 2 times with my 2.5. Also, the hollow center of the foam is unsupported, so it could possibly collapse if the engine is at a high enough RPM.