AAEN PERFORMANCE has developed a new header pipe for Yamaha’s Nytro that adds 8 horses over stock. The first section of the header pipe is increased from the stock 1.375 inches outside diameter tubing to 1.5-inches tubing. Halfway up the collector junction the tubing is increased to 1.625 inches. This extra flow area results in the 8-horse increase at the 8,600 rpm power peak, and an 11-hp increase past the power peak at 9,200 rpm, making the power curve almost flat all the way to 9,200. Torque is improved by 8.4 lbs.-ft. at the power peak. The Aaen Nytro Header is ceramic-coated and works well with both the stock muffler and Aaen’s Mega Power Silencer. The header installed with an Aaen Mega Power Silencer offers an extra 6 hp for a total of 14 horses for the combination. Cost for the Nytro Double Step Header Pipe is $475 and the Nytro Mega Power Silencer is $449. More info:
www.aaenperformance.com, 262-552-8981