Prepare to turn heads on your motorcycle with the 2-into-2 Big Radius Exhaust from Vance & Hines. Constructed using 16-gauge steel, these 1-3/4" diameter pipes feature full-coverage heat shields and striking end treatments with the Vance & Hines badge. The internal, radius-covered, louvered baffles are dyno-tuned to give your bike that deep, get-outta-my-way sound it deserves. The O2 oxygen sensor has been positioned deep in the exhaust system for more accurate feedback to the ECM - meaning more power and torque too. Distinctive curved styling and a great sound Full-coverage heat shields If your motorcycle does not have EFI, your installation will require O2 sensor plugs, which may be purchased separately For engines with electronic fuel injection, the purchase of Vance & Hines Fuelpak or Fuelpak FP3 is recommended for best performance Metal exhaust port gaskets may need to be purchased separately before installation