If you're the King of the Road - why not sound like it? Ditch your puny, not-so-manly horns for a big ass 25 inches Roof Mounted monster. Note : Model 411 does not include a valve and requires the use of a solenoid valve or hand pull valve pg. 19 as well as a Roof Mount Air Horn Fittings Kit p/n 330 for operation.
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.