Big Gun Exhaust EVO ECO EXO EFI TFI Fuel Controller Power Box RZR 800 S & 4 —
BIG GUN EXHAUST TFI FUEL CONTROLLER. RZR 800 / S / 4 2008 – 2010. When installing an aftermarket exhaust the proper tuning is a must. The Big Gun TFI fuel controller is a Plug and Play fuel controller that allows you to properly tune your cue injected application in just minutes. Installing the TFI […]