Sprint RACE Air Filter
For RS660 & Tuono 660
Sprint filters refers to this as the P08 F1-85 media filter.
This is the most aggressive, 'barely there' air filter we've ever seen. Made with single layer polyester filtration media (almost all other manufacturers use 4 layer cotton), the super thin filtering layer was found by Sprint to be 17% more efficient at trapping particles down to 100 microns in size.
The polyester media was also found to be more effective in trapping moisture.
Here is Sprint Filters take on this unique design:
Developed in the labe and verified on the track the P08F1-85 is the air filter of choice for many world champoionship teams. It offers the highest existing permeability and ensures engine protection by the 85 micron filtration media. Air flow performance is guaranteed by over 15,000 l/m2 per second. All fo these features make the P08F1-85 an excellent choice for racing.
The comparision photo below shows how much less dense the filtering media is in this race filter versus the Sprint PM176S Road Filter: