K&N Replacement Air Filter Can-Am Outlander 650 / 800 EFIK&N Custom Assembly Filter Kits utilise an adapter or tube that mounts directly to the airbox. The universal clamp on air filter then attaches to the adapter or tube. The large mounting surface of the clamp on air filter provides better stability during rigorous riding. The assembly adapter or tube acts as a velocity stack within the airbox. K&N Custom Assembly Filter Kits, like all K&N air filters, are designed to provide excellent filtration and