Twin Air Standard Air Filter — GasGas MC 65 (2021-2023), Husqvarna TC 65

Twin Air's Standard Air Filter is the dual-stage foam filter that's been the benchmark in dirt-bike air filtration for decades. Two fused layers of open-pore foam — coarse outer, fine inner — trap airborne dust, grime, and sand while keeping airflow high. Assembled by hand and inspected for fit, with model-specific molds for 1500+ motorcycles dating back to 1965.

• Dual-stage open-cell foam — outer catches grit, inner traps fine particles
• Hand-assembled and inspected, with a greaseless sealing ring
• Washable and reusable — 30+ cleaning cycles is typical
• Model-specific fit — no universal sizes
• Drops into the OEM airbox

Fitment: bike-specific air-box fit. Drops into the OEM air-box on:

• GasGas MC 65 (2021-2023)
• Husqvarna TC 65 (2017-2023)
• KTM 400 LC-4 Duke (1997-2004)
• KTM 60 SX (1998-2000)
• KTM 620 LC-4 Duke (1997-2006)
• KTM 625 LC-4 Duke (1997-2006)
• KTM 625 SMC (2003-2007)
• KTM 625 SXC (2003-2007)
• KTM 640 Adventure (1998-2006)
• KTM 640 Duke-E (1998)
• KTM 640 LC-4 Duke (1999-2010)
• KTM 640 LC4 (1998-2006)
• KTM 65 SX (1997-2023)