DNA Air Filters - Stage 2 Air Filter Cover for Yamaha MT-09 21-23 / MT-09 SP 21-23 / Tracer 9 21-23 / Tracer 9 GT 21-23 / XSR 900 22-23This filter features DNAs 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 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