TWIN AIR - Pre-oiled air filter (ref. 158089X)
Specifically designed for the Cross universe, this Twin Air filter combines a multi-layer construction and selected materials to ensure effective filtration without sacrificing airflow in the housing. Ideal for riders who want a ready-to-install, robust element suitable for off-road conditions.

• Double foam construction: a first airy layer traps sand grains and dust, while the denser second layer stops fine particles while maintaining the necessary airflow for the engine.
• Specific adhesive: the adhesive developed for Twin Air maintains the cohesion of the foam envelopes and resists solvents and petrol.
• Compact design: slightly smaller than the original element to free up volume in the airbox and promote the flow of intake air.
• Breathable seal: ensures maximum contact surface with the housing body to limit infiltrations.
• Pre-oiled: delivered ready for installation, the bonding of the layers prevents dust accumulation between the foams.

Manufacturer reference: 158089X. Compatible with recent Cross models such as BETA XTRAINER 300 2T (2026), BETA XTRAINER 250 2T (2026), and BETA RX 450 4T (2025). Regular maintenance is recommended to preserve filtration efficiency on your muddy or dusty outings.