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  • The most popular mod for an all-around performance boost
  • An adrenalized version of the Super BN series
  • Extensive race testing for higher air and fuel flow
  • Uses primer fitting with butterfly choke removed for increased airflow (primer kit necessary)
  • Special needle valves and springs give optimum pop-off for a strong mid-range
  • Larger high- and low-speed jets for great response and killer top end
  • Jetted for applications using aftermarket manifold and flame arrestor 2.3 viton needle valve, #100 pilot jet and #125 main (high) jet