If you one of the thousands of people frustrated that Your beautiful boat's gleaming exhaust tips are finished off with an ugly rubber Salisbury flap then we finally have your answer. These new 316L stainless steel clamp on external flaps slide on to and clamp to a 4" stainless exhaust tip. They are not only do the job their designed for but they will do it in style. 1" of exposed exhaust pipe is required for mounting. Sold in pairs.