You can Count on us for the right parts! DT-1 has been manufacturing air-filters for over 30 years and is the choice of todays top professionals. DT-1’s world class foam technology delivers maximum airflow while maintaining critical engine protection. Their super-seal base creates the cleanest and best seal on the market. All DT-1 Air Filters are handmade manufactured in Belgium and USA with the highest quality bonded dual and triple foam available. DT-1 Air Filters come standard or pre-oiled. Our pre-oiled filters are oiled with the highest quality flame resistant bio-degrable filter oil. DT-1? S world-class foam technology delivers maximum airflow while maintaining critical engine protection. Their Super Seal base eliminates the need for grease and creates the cleanest and best seal on the market. All DT-1 Air Filters are handmade in Belgium with the highest-quality bonded dual, triple and evolution foam available. DT-1 Air Filters come standard or pre-oiled with highest-quality flame-resistant bio-degrable filter oil. On all orders in the UK. Honda CRF 450 RX 2017 DT1 Racing Pre-Oiled Air Filter DT-120-17PO.