5″ Clamp on Gatlin Mufflers are Designed to push on over 4″ exhaust tip out let. 16″ O/A length, 12″ muffler section. The ultimate in high performance mufflers. Designed for big horsepower motors. All Gatlin mufflers are stainless steel, highly polished. Our unique perforated 7 tubes with stainless steel wool packing will calm even the wildest beast.(SOLD IN PAIRS)