Enlarged interconnected headers make for improved horsepower and low-end torque1.75” to 1.875” high-flow 16-gauge stepped primary headersFeatures full 2” left side crossover and 4-1/2” muffler bodies with 2” inlets2.50”, 220°, 16-gauge heat shieldsRemovable baffles are wrapped in stainless steel wool and high-temp fiberglass for a rich mellow tone18mm and 12mm O2 bungs welded into the primariesHeavy-duty, AccuSeal® reaction-block header-to-muffler clamps includedOptional Ripper baffles boost low-end performance and enhance sound available separatelyAdditional performance baffles are available separatelyMade in the U.S.A.