The Sprint Filter P037 air filter with the P08F1-85 it is the only air filter in the world with water proof characteristics (Sprint Filter patent allows it to be the only manufacturer in the world to produce waterproof air filters for endothermic engines). The weave of the fabric guarantees a filtration ratio of 37 microns, therefore very pushed, which combined with water proof capacities makes this type of filter particularly suitable for use in heavy conditions with presence of mud (no sand and fine powders). The guaranteed air passage of 4500 l./m2sec, has allowed a BMW GS 1200 equipped with only the exhaust terminal and air filter P037, to be the fastest GS1200 in the world: 233.35 Km./h, performance obtained on the lake salty of Bonneville, Utah, USA.