www.itrsport.com said:A major contributor to the Type R's ability to generate 195 horsepower from only 1.8 liters displacement is its highly efficient exhaust system. The exhaust flow rate has been increased by 30 percent over the Integra GS-R model thanks to a number of improvements. Starting with a large-diameter Tri-Y header system, the individual head pipes gently converge into a tapered collector to provide smooth flow with minimum obstruction. The stainless steel header connects to an exhaust system with significantly increased pipe diameters, the addition of a third exhaust chamber, and a performance-oriented muffler with a large NSX-style exhaust tip.