Installed Correctly (click on picture for larger view)
Installed Upside-Down (click on picture for larger view)For maximum performance, ARC's air filter adapter is ported to the low speed (left) and high speed (right) orifice jets. This is necessary because the funneled velocity stack design would otherwise cover these jets. Improper installation of the air filter adapter will partially cover, and impede flow to the orifice jets because they are not in the same position. The engine will spit and sputter and lack both bottom, and top end power if these orifice jets are blocked.