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Oxygen sensor ports allow the use of wide band or stock O2 sensors
2011 Yamaha TTR125L
2004 Harley Davidson FXDWGI Dyna Wide Glide
Has not been tested for EPA noise compliance
2007-2009 Yamaha WR250F
Two Brothers Racing 005-4470407-S1B S1-R Slip-On - Carbon Fiber Muffler (Black) manuals Oxygen sensor ports allow theMarketing Color: Black Material: Carbon Fiber The S1R exhaust is a state of the art product from Two Brothers Racing. The system features carbon fiber highlighted by a natural finished Aluminum outlet and stamped spring mounted inlet for ultimate durability. The S1R exhaust from Two Brothers Racing showcases a race design while increasing all around performance. All of our carbon parts are made with a high temp aerospace grade epoxy resin. The carbon
