Description Features & Benefits:-TRASK PERFORMANCE CheckM8™ vented transmission top cover fixes the excessive crankcase breather pressure issue on Harley-Davidson M8 engines.* 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.* Made in the U.S.A
