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About Big Gun Exhaust TFI Power Box

Big Gun Exhaust TFI Power Box

  • Increases horsepower
  • Improves throttle response
  • Installs in minutes
  • New third generation technology
  • No computer needed to adjust EFI
  • Plug-in technology (does not interfere with stock ECU map)
  • Integrated faceplate buttons provide easy adjustment
  • Highly recommended for any EFI unit with aftermarket exhaust.

Warning:  California Proposition 65

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