The Twin Air Powerflow Kit includes a BIO Factory Pre-Oiled air filter and components designed for its installation. The lightweight aluminum cage replaces the standard plastic cage and helps seal the airbox.
The four-stroke kit includes a screen with an inner lining of backfire-resistant foam, instead of the standard restrictive screen. This version for the 2010–2013 YZ450F also includes an airbox, wash plug, cage, and mounting hardware.