R&D Kawasaki SXR800 or Yamaha SuperJet Stock Exhaust Power Sleeve

R&D billet aluminum exhaust power sleeve is designed to insert into the stinger of stock SXR800 or SJ701 exhaust to reduce stinger size for more back pressure
This is a simple installation that will increase horsepower and top speed with Stock Kawasaki SXR800 or Yamaha SuperJet Exhaust system
Fit all Kawasaki SXR 800 2003-2011(331-80000) or Yamaha SuperJet 1996-2020 (332-00701) original exhaust system