Using Lisle threaded super funnels is the best way to employ hands-free filling on your threaded valve cover openings. These two-piece funnels can be used separately or threaded together for a super-long funnel. The large section twists into the threaded oil filler openings found on many Ford trucks and Dodge, Jeep, and Chrysler cars, minivans, and SUVs. The diameter of the smaller funnel is narrow enough to fit even the smallest applications, such as transmission filler holes--Lisle's threaded super funnel does it all.