Bbr 430-klx-1110 air filter kit u-flow klx/drz110 02-08 (430-KLX-1110) High performance, high-flow filter and base designed to maximize airflow over the restrictive stock setup Air filter base is CAD designed and CNC machined from HDPE plastic TTR filter is 3 times larger than the stock filter and adds almost 1/2 horsepower