Twin Air Backfire/Replacement Filter | 156084FR Aprilia The SX rear guide is

The SX rear guide is Constructed from a flexible composite plastic and designed with a tapered profile to reduce drag in ruts

Detailed instructions outline simple installation

Either clip or rivet type

Engineered by No Toil to keep your chain clean & lubricated under the harshest conditions

Twin Air Backfire/Replacement Filter | 156084FR Aprilia The SX rear guide isThick, flat foam, greaseless sealing ring ensures maximum contact with your airbox while acting as a breathable gasket for increased air passage. Coarse open pore foam catches airborn dirt, grime and sand Fine open pore inner foam acts as second filter to trap the smallest particles while ensuring maximum air passage Adhesive withstands repeated cleaning Smaller than stock to increase air space and circulation around filter