The best filter in the world can't do its job if there are leaks in the seal of the airbox. That's why Twin Air provides a complete line of products to ensure a leak-proof, fool proof fit.
Twin Air's PowerFlow kit comes with a rigid, lightweight, billet aluminum cage that provides a tight seal to the airbox and replaces your flimsy plastic stock cage.
A TwinAir Powerflow Kit includes a pre-oiled Twin Air filter, a special aluminum cage and all necessary mounting hardware.
Twin Air PowerFlow Kit for 4-Stroke models:
Replace your air-restricting stock backfire screen with our New PowerFlow kit. The kit includes a rigid, lightweight, billet aluminum cage with a special backfire-resistant layer of foam laminated to the inside of the filter.
PowerFlow kits are available for many models, and we're constantly adding new ones to fix issues with OEM airboxes.
The 2018 Yamaha YZ450F kit contains: sealing ring, air filter cage and filter bolt to replace the OEM filter system. There are two different airbox covers available: one for the OEM air filter cage and one for the Twin Air Powerflow kit.