Fuel Customs Pre-filters (outerwears) are used and recommended by top professional engine builders and race teams worldwide.
Pre-fitlers help prevent needless engine wear and tear. They are designed to keep out larger particles such as dirt and sand from getting into and clogging the pleats of air filter elements. Particles as small as .005" are filtered out extending filter life. Even in harsh conditions including heavy moisture, it will enhance your filter's ability to continue flowing the necessary air required for maximum performance while reducing the possibility of water ingestion into the engine.
Note-Proper use of a Pre-filter will save money on filter cleanings or replacements and extend engine life.
Foam Outerwear-
Excellent protection from mud and water. FCI's foam filters are recommended for wet & muddy conditions. They recommend running it dry.
Note-Does not fit LTR or KTM.