0 - items(s)

You have no items in your shopping cart.

John Deere Gator Rsx 850i Big Gun Tfi Power Box Ecu Fuel Controller 40-R55A

John Deere Gator Rsx 850i Big Gun Tfi Power Box Ecu Fuel Controller 40-R55A

More Views


  • MSRP: $289.99
  • You Save: $58.00 (20%)
  • Brand: Big Gun Exhaust
  • Condition: New
  • SKU: 40-R55A
  • Manufacturer Part Number: 40-R55A
  • Surface Finish: Black
  • Warranty: Yes
  • Part Brand: Big Gun
  • Make: John Deere
  • Placement on Vehicle: Front
  • Fits: UTV
  • Country of Manufacture: United States
  • Compatible Make: GATOR RSX 850i
  • Years: 2013-2016

Big Gun TFI Power Box - Increase Horse Power, Easy to Install. Push Button Adjustments

Fits All Models Listed:

John Deere Gator RSX 850i 2013, 2014, 2015, 2016 year model
Brand NEW Model: 

  • Increases horsepower.
  • Improves throttle response.
  • Installs in minutes.
  • Plug in technology (Does not interfere with stock ECU map).
  • Integrated face plate buttons provide for easy adjustments.
  • Adjust on the fly.
  • Highly recommended for and EFI unit with an aftermarket exhaust.

Part# 40-R55A
Retail Price: $289.99


Shipping Information;

This item is in stock and ready to ship today!! We ship this item World Wide..


Free Shipping for Multiple Items!!

If you purchase multiple items, we are glad to offer you free shipping charges. Our checkout system will automatically combine your auction purchases into a single order and consolidate your shipping charges.



Contact information; if you have any questions, we are here to help!


**Picture is for illustration purposes only. You will receive the

Brands & Clients

  • brand