Big Gun TFI Power Box for Arctic Cat 425 / 450 Models - 40-R50F

Regular price $225.01

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Big Gun Exhaust TFI Power Box

Part Number: 40-R50F

  • Increases horsepower and throttle response
  • Installs in minutes
  • 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
  • 1 Year Limited Warranty

When installing an aftermarket exhaust, proper tuning is a must. The Big Gun Power Box is a plug-and-play fuel controller that allows you to properly tune your fuel injected motorcycle, ATV or Side x Side in just minutes. Installing a Power Box allows you to get the most out of your aftermarket exhaust and increases throttle response. A Power Box helps cure the lean issue that is run into when installing a higher-flowing exhaust and comes pre-programmed with a middle-of-the-road setting already into it, making it easy to install and go ride.


  • This product is not ARB / CARB compliant and cannot be sold in the state of California
  • Image(s) shown may not represent the actual product sold for this vehicle, See "Fits" section for application indications (part shipped will fit applications indicated in the description)

Fits: 2012 Arctic Cat 425 4x4 EFI
2012 Arctic Cat 425 4x4 SE EFI
2011 Arctic Cat 425 4x4 CR EFI
2013 Arctic Cat 450 CR
2012 Arctic Cat 450 4X4
2012 Arctic Cat 450 4x4 EFI
2012 Arctic Cat 450 4x4 GT EFI
2012 Arctic Cat 450 4x4 TRV EFI
2012 Arctic Cat 450 4x4 TRV GT EFI
2011 Arctic Cat 450 4x4 EFI
2011 Arctic Cat 450 4x4 H1 EFI
2011 Arctic Cat 450 4x4 LTD EFI
2011 Arctic Cat 450 4x4 TRV EFI