P08F1-85 is the ultimate performance air filter available from Sprint Filter, developed over many years and currently in use by Factory MotoGP and SBK Racing Teams. An independent testing carried out by University of Wales Trinity St David, Sprint Filter's P08 polyester tissue, the "standard" tissue found in Sprint Filter replacement air filters, provided the best airflow of any leading brand filter, including leading brand "race" filters. By comparison, Sprint Filter P08F1-85 provides almost three times the airflow of P08 with virtually the same filtration performance, which makes P08F1-85 suitable even for moderate road use as well as race.