The DNA Stage 2 Air Filter / Airbox Lid Kit for your Yamaha YZF-R9 is a drop-in kit that is proven to increase airflow by almost 40%!

Full product details:

• This filter features DNA®’s Stage 2 kit eliminates the OEM intake snorkel of Yamaha models 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-Y9N24-S2 there is no need to use the OEM air filter or DNA P-Y9N24-01.
• 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.
• Fuel injection recalibration is recommended in order to take full advantage of the airflow increase and avoid the engine running lean!
• Installation of this new DNA Air filter is easy; simply follow the DNA installation instructions included in the DNA packaging.
• The filtering efficiency* is extremely high at 98-99% filtering efficiency (ISO 5011), with 4 layers of DNA® Cotton.
• DNA Filters are supplied pre-oiled from our factory. The correct amount of DNA oil is applied οn each filter individually.
• The flow of this new DNA filter is +38.70% more than the stock filter!
• DNA Stage 2 air filter flow: 5020 lit/min (per filter) (l/min) @3,7 mBar / corrected @ 25degrees Celsius
• OEM Air box with stock filter’s flow: 3620 lit/min (per filter) (l/min) @3,7 mBar / corrected @ 25degrees Celsius
• This DNA® air filter is designed as a High Flow Air filter for ‘Race use Only’.