XForce Smartbox - Varex Muffler Control Module for F36

Name: XForce Smartbox - Varex Muffler Control Module for F36
Brand: XForce
SKU: 4784759
Price: 399 USD
Availability: InStock

by XForce

F36

$399.00

Buy on ECS Tuning

Key Features

Controls XForce Varex valved muffler operation
Fits BMW F36 with compatible XForce setup
Not an engine ECU tune or power module
Best for switching between quiet and loud modes
Requires matching Varex muffler hardware to function
Verify wiring compatibility before ordering

Product Details

Brand: XForce
Part #: 4784759
Category: ECU Tuning & Flash

Check if it fits your BMW

XForce Smartbox - Varex Muffler Control Module for F36 — Overview

The XForce Smartbox is the control module used with XForce Varex valved mufflers, letting you adjust the muffler valve behavior instead of being stuck with a fixed open or closed setup. On an F36, this is the piece you buy if you're already running a compatible XForce Varex muffler and want proper electronic control over exhaust sound. It is not an engine tune, despite the ECU wording in the product title. Think of it as the brains for the muffler valve, not something that changes boost, timing, or fueling.

I'd pick this over a basic manual valve setup if you actually use the car in different situations - cold starts in a parking garage, highway cruising, then opening it up when the road clears. If you do not have a Varex muffler already, this module alone does nothing for you. Fitment matters here because it needs to work with the matching XForce exhaust hardware, so double check the muffler setup on your F36 before ordering. Simple product, but only when it's paired with the right parts.