RFX Pre-Oiled Air Filter FXAF1000355PO - Honda CRF250R 2010-2013 / CRF450R 2009-2012

Product Description

The RFX Pre-Oiled Air Filter delivers high-flow intake performance and engine protection for four-stroke Honda motocross models. Produced by Multi Air, this pre-oiled foam air filter arrives ready to install directly out of the packaging, saving you prep time before track sessions and race days.

Utilizing a twin-layer foam construction, the coarse outer layer filters out larger roost, sand, and dirt particles, while the inner fine-pore foam traps microscopic dust before it can reach your intake valve train. Constructed from flame-retardant foam tailored specifically for high-heat four-stroke powerplants, it offers a precise airbox fitment backed by Multi Air's 30-plus years of filtration engineering.

Top Features: RFX Pre-Oiled Air Filter

• Factory pre-oiled foam construction allows direct out-of-the-box installation without additional oiling needed.
• Twin-layer foam design optimizes air intake volume while stopping fine dust particulates.
• Specially formulated flame-retardant foam protects against engine backfire hazards in four-stroke intakes.
• Precision-molded sealing lip ensures a tight seal against the airbox wall to block dirt bypass.
• Manufactured by Multi Air using over 30 years of motocross filtration experience.

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Is this RFX air filter ready to use straight out of the package?
A: Yes, this filter comes pre-oiled with filter fluid from the factory, so you can install it directly into your airbox.

Q: Why is flame-retardant foam used on 4-stroke air filters?
A: Four-stroke engines can occasionally backfire through the intake system. Flame-retardant foam prevents backfire sparks from igniting the filter media or filter oil.

Q: How often should I inspect and clean this filter?
A: Inspect your filter after every ride. In dry or heavy roost conditions, clean and re-oil or replace the filter after each ride to maintain proper engine protection.

Expert Pro-Tip: When installing a fresh pre-oiled air filter, wipe the airbox sealing surface clean with a lint-free shop towel first. Apply a thin bead of waterproof rim grease along the sealing edge of the filter base to create an airtight seal that prevents micro-dust from creeping past the airbox mating surface during long, dusty motos.

Recommended Pairings:

• Honda CRF250R Performance Parts & Upgrades
• Honda CRF450R Performance Parts & Upgrades
• Air Filter Cleaners & Maintenance Chemicals

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