Enlarged interconnected headers make for improved horsepower and low-end torque. 1.75” to 1.875” high-flow 16-gauge stepped primary headers. Features full 2” left side crossover and 4-1/2” muffler bodies with 2” inlets. 2.50”, 220°, 16-gauge heat shields. Removable baffles are wrapped in stainless steel wool and high-temp fiberglass for a rich mellow tone. 18mm and 12mm O2 bungs welded into the primaries. Heavy-duty, AccuSeal® reaction-block header-to-muffler clamps included. Optional Ripper baffles boost low-end performance and enhance sound available separately. Additional performance baffles are available separately. Made in the U.S.A..