DNA STAGE 2 PERFORMANCE AIR FILTER KIT YAMAHA MT-09 / SP 2021-23. This DNA®’s Stage 2 kit eliminates the OEM intake snorkel of YAMAHA models mentioned above and offers higher performance and better intake sound. This Stage 2 kit is designed to replace the stock plastic air box top cover and OEM air filter. With the use of P-Y9N21-S2 there is no need to use the OEM air filter or DNA P-Y9N21-01. Included in the Stage 2 kit you will find all the necessary parts to install the Stage 2. Special stainless steel bracket for mounting the stock ECU is supplied and also zip ties to mount and tie down your ECU are supplied. The filtering efficiency is extremely high at 98-99% filtering efficiency, with 4 layers of DNA® Cotton for maximum engine protection, even in the harshest conditions. This DNA High performance air filter is a high quality, next generation, multi-layer cotton gauze, oil impregnated air filter that NEVER needs replacing. Design & Manufacture The filter media is made of 4 layers of high quality surgical cotton gauze sandwiched between two layers of epoxy coated marine grade aluminum wire mesh pleated by state of the art electronically controlled machines to assure a very high quality of filtration media. The result of the special design and the hi-tech manufacturing process is a filtration media that has very high flow rates, low restriction, superior dust holding capability and smoothens out the air flow stream. Special Oil Oil that is used to impregnate the cotton is a very special grade developed by the DNA R&D department after intense testing and produced by one of the world’s best oil companies. This special oil is a very critical part of the filter and has the capability to produce a static charge to the cotton media and attract the entire dust particles that flow towards the filter, even the very fine ones. The Long Life DNA air filter will last the life of the vehicle. Taking Care of the Filter The DNA Air Filter will serve you for many years and needs very little care using the optional DNA Service kit. When the filter is dirty or approximately after every 3000 miles, simply follow the cleaning instructions that you can find in the service kit, allow the filter to dry, re-oil and you are ready to use your filter again, like new! This DNA Filter is designed as a high flow air filter for:”Road & Race use”. Optional DNA Air Filter Service Kit. The flow of the DNA Air Filter is +54.78% over the OEM airbox top cover & air filter. Special Oil Oil that is uséd to impregnate the cotton is a very special grade developed by the DNA R&D department after intense testing and produced by one of the world’s best oil companies. No additional information at this time. You might also like. IXIL Race Xtrem Carbon Full System Yamaha MT-09 / SP 2021-23. IXIL Black Hyperlow Full System Yamaha MT-09 / SP 2021-23. IXIL Black Hyperlow Full System Yamaha XSR 900 2022-23. IXIL Black Full System Low mount – Honda Monkey 125 2018-23.