No more spilling onto your valve cover, into those little pockets and steaming off your valve cover. Lock this into the filler neck on the N52, N54, N55, S55 and more and fill with your hearts content as the breather hole will allow for quick filling of your engine, without having to wait for air lock bubbles to come up
No need for over tightening the funnel, a soft lock is plenty for the job!
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