A muffler in a tube; the revolutionary design of our patented Linear Series muffler technology has proven to be one of the most significant innovations in marine diesel engine exhaust technology. Through a continuing series of enhancements that began in the early 1990's, the Linear Series muffler product line continues to evolve; handling ever increasing engine horsepower capacities while requiring less and less space. Its reliable performance in a range of diverse applications is unmatched in the industry. Marine Exhaust Systems continues to invest its technological expertise in the Linear Series muffler to further improve and develop this innovative product line.