Outer Saver Pre-Filter for .21 Engines w/ Outside Foam #MSFOS1400

Fits: Motor Saver filters with outside foam,
HPI .21+ Air Cleaner (87198), HPI (72438), DuraTrax Warhead MT, Integy Xtra Large Monster Truck Series, Losi LST, LST2 & AFT, Ofna Jammin X1, RB Innovations High Performance Cyclone, RB Products Air Filter System, and more.

• The new Outer Saver pre-filter has the same high quality, fine micron opening as our new line of Large 1/8 Scale Off-Road air filters.
• Outer Savers maintain high airflow longer than oiled 2-stage foam air cleaners alone. Outer Saver pre-filters do not restrict airflow.
• Models come with or without a pre-punched hole.
• Secures tightly around existing filters helping foam and internal plastic parts to stay in place.
• Designed to be blown clean with compressed air or lightly rinsed with soap and water.

Actual Dimensions Best Fit Range Shape: round Length: 1-5/8" to 1-3/4" (41mm to 44mm) Length: 2-5/16" (58mm) Width: 1-3/4" to 2-1/16" (44mm to 52mm) Width: 2-1/8" (54mm) Height:1-3/4" to 2-1/16" (44mm to 52mm) Height: 2-1/8" (54mm)