Twin Air PowerFlow Kit Polaris RZR / ACE / General Twin Air's filter boasts a high-density, flat foam sealing ring that delivers optimal contact with your airbox, operating as a breathable gasket that enhances air passage. This greaseless function ensures optimal performance. Features: Coarse open-pore foam catches airborne dirt, grime, and sand Fine open-pore inner foam acts as second filter to trap the smallest particles while ensuring maximum air passage Adhesive withstands repeated cleaning Smaller than stock to increase air space and circulation around filter Note: Image is for reference only. Filter will vary depending on make and model of vehicle.