The Royal Enfield RAV00278/A Air Filter Box Assy with Chrome Sticker is a genuine Royal Enfield replacement air intake component designed for the Bullet X 350 ES ABS BS4.
The air filter box houses the air filter element and forms an important part of the engine’s air intake system. It helps route incoming air through the filter before it reaches the engine, while also helping protect the intake system from dust and road debris.
The assembly features a Chrome sticker finish/graphic, matching the original styling of the compatible Bullet X 350 ES ABS BS4.
Royal Enfield parts catalogue description: “AIR FILTER BOX ASSY WITH CHROME STICKER.”
This assembly is suitable for replacing a damaged, cracked or missing air filter box while maintaining the original mounting arrangement and appearance.
Key Features
- Genuine Royal Enfield replacement part
- Part Number: RAV00278/A
- Catalogue Description: AIR FILTER BOX ASSY WITH CHROME STICKER
- Designed for Royal Enfield Bullet X 350 ES ABS BS4
- Chrome sticker graphics
- Air filter housing / air box assembly
- Protects and houses the air filter
- Supports proper engine air intake routing
- OEM-style mounting and fitment
- Original Royal Enfield replacement specification
Compatibility
- Royal Enfield Bullet X 350 ES ABS BS4
Important: Verify the motorcycle’s exact model, ES configuration, ABS specification and BS4 configuration before ordering. Do not assume compatibility with KS variants, BS6 or J-Series models.
Application
Engine Air Intake / Air Filter Housing
Used as the air filter box assembly on the compatible Royal Enfield Bullet X 350 ES ABS BS4.
Package Contents
- 1 × Royal Enfield RAV00278/A Air Filter Box Assembly with Chrome Sticker
Air filter element, intake hose, clamps, mounting hardware and other components are not assumed to be included unless specifically mentioned in the supplied packaging.
Installation
Professional installation by a qualified Royal Enfield mechanic is recommended. Ensure the air box, filter element and intake connections are correctly fitted and sealed to prevent unfiltered air from entering the engine.










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