short ram. that is a florida opinion though due to all the rain. i dont care what people say about "bypass valves" but they DO FAIL. not everytime, but just once is enough to hyrdolock a honda engine and bend EVERYTHING under the valve cover. there is really no instructions needed for it one the 06 and prior either. just take the old one off, put the new one on and go. no fishing stuff thru the fender and having to remove the battery, etc.