DNA PERFORMANCE AIR FILTER APRILIA SHIVER 750 2008-16. This filter is designed to replace the stock filter without any modifications. Installation of the filter must be done by a trained mechanic, following the information that can be found in Aprilia’s workshop manual. The filtering efficiency is extremely high, 98-99% filtering efficiency. Filtering efficiency is the amount of “dirt” the filter can maintain (stop) and protect the engine efficiently. For example the DNA Filter for every 100 grams of dirt that it will receive, it will hold 98-99 grams, this applies even to fine dirt as small as 5 microns. Compared to the stock filter, only the very best of the stock paper filters can achieve filtering efficiency up to 99% but the air flow is low. Foam filters are lower and depend highly on the type & amount of oil used to oil them. F iltering efficiency is the amount of “dirt” the filter can maintain (stop) and protect the engine efficiently. For example the DNA Filter. For every 100 grams of dirt that it will receive, it will hold 98-99 grams, this applies even to fine dirt as small as 5 microns. Foam filters are lower and depend highly on the type & amount of oil uséd to oil them. O Compared to the stock APRILIA paper filter at 135,7 CFM. No additional information at this time. You might also like. DNA Performance Oval Air Filter Set Kawasaki Zephyr ZR1100 1992-99. DNA PERFORMANCE AIR FILTER – SERVICE KIT. DNA CRANK CASE VENT FEMALE OVAL RUBBER TOP 18mmID. Termignoni Silencer / DNA Filter Bundle – YAMAHA TENERE 700 2019-22.