BRAND NEW PART# TM-2041BK Fits Harley M-Eight Models Reduce or even eliminate the oil coming from the head breathers on your M8 Machined from Billet Aluminum with a Boyesen one-way reed valve to vent the excessive crankcase pressure No annoying hose on your dipstick to worry about when checking your oil Proven on the Trask Performance King of the Baggers Race Bike Free up horsepower on M8 engines by allowing to rev easier Includes hose and breather filter