(Optional) If you want to install the Air Assist Valve tube, connect the supplied hose and route it to a spot on the intake tube. If you choose not to make this connection, DO NOT DRILL A HOLE FOR IT.

(Optional) If you want to install the valve cover breather tube, connect the supplied tube and route it to a spot on the intake tube. If you choose to NOT make this connection DO NOT DRILL A HOLE FOR IT and move to step 7.

The Air Assist Valve allows for a faster warm-up in cold weather. The cylinder head cover breather tube allows for pressure relief. This may allow oil vapor to be ingested into the engine. Consider connecting an oil catch can, or simply install a breather filter if you choose.