Every head pipe is coated with exclusive 1700deg ceramic to ensure excellent heat dissipation The Crossover series is a mid-length system with a welded in crossover for that 2-into-2 look with the performance of a balanced system Angled aluminum tips which have multiple mounting positions Systems come with O2 sensor provisions (2004-06 models without O2 sensors require O2 Port Plug) The head pipe is 1.75" with a larger 2.25" welded muffler body providing excellent flow and the 2.5" heat shields give a strong look to any bike 1-Year manufacturer's warranty