The crank case breather system takes the blow-by gasses from your engine's compression stroke and returns them back into the engine to be burned again (recycled) by venting them into the air box.
The crank case is full of oil vapors and those vapors are sent into the combustion chamber where they form deposits on the position and valves.
Bypassing these vapors away from the air box will eliminate carbon build up and deposits in your top end.
- 100% soft flexible silicone rubber
- Includes air box inlet plug