XForce Exhaust Systems Explained: VAREX Technology & Smart Box Buyer's Guide

XForce Exhaust Systems Explained: VAREX Technology & Smart Box Buyer's Guide

Choosing an aftermarket exhaust usually forces you into a compromise: do you buy a loud, free-flowing system and risk waking up your entire neighborhood every morning, or do you buy a quieter, resonated system and miss out on the aggressive tone your tuned engine deserves?

XForce, an Australian born performance exhaust manufacturer, has eliminated that compromise completely. Built under the philosophy of "by enthusiasts, for enthusiasts," XForce specializes in high quality, dyno proven stainless steel exhaust systems. But what truly separates them from a highly saturated market is their revolutionary patented VAREX® muffler technology and the VAREX Smart Box.

Rather than forcing you to choose between a loud non-resonated system or a quiet resonated one, XForce gives you infinite control over your car's exhaust volume at the push of a button or the swipe of a smartphone.

The VAREX® Muffler System: Two Exhausts in One

At the core of an XForce system is the VAREX muffler. Inside the rear silencer sits a precision-engineered butterfly valve mechanism connected to an electronic motor.

  • Street Mode (Valves Closed): The exhaust gas is redirected through a series of baffled chambers inside the muffler, acting like an OEM system. This significantly reduces decibel levels, eliminating highway drone and making early morning cold starts perfectly stealthy.
  • Race Mode (Valves Open): The butterfly valve opens completely, directing exhaust gases straight through the muffler core. This provides maximum flow, zero backpressure, and the raw, aggressive exhaust note of a straight-pipe system.

Using the supplied remote control fobs, drivers can toggle between Street mode, Race mode, or anywhere in between, instantly adjusting the volume to suit their environment.

The VAREX Smart Box: The Ultimate USP

While some traditional exhaust brands require you to buy specific "resonated" or "non-resonated" mid-pipes to get the sound you want, XForce simplifies the hardware and gives you absolute digital control through the VAREX Smart Box.

The Smart Box connects your VAREX exhaust to your smartphone via Bluetooth, unlocking an incredible suite of features:

  • Matrix Mode (Geofencing): You can draw a boundary on a GPS map around your neighborhood or workplace. The Smart Box will automatically close your exhaust valves when you cross that boundary, and open them back up when you leave.
  • RPM & Throttle Mapping: Using an OBD2 plug, you can program the exhaust valves to open automatically at a specific RPM or throttle position. Keep it quiet while cruising at 2,000 RPM, and have it scream the second you bury the throttle past 4,000 RPM.
  • Infinite Adjustability: Set the valves to 10%, 25%, 50%, or 100% open with digital precision.

Build Quality & Performance Engineering

Beyond the electronics, XForce exhaust systems are serious performance hardware.

  • Premium Materials: Manufactured from high-grade 304 stainless steel and precision TIG-welded for longevity and corrosion resistance.
  • Mandrel Bending: All pipework features smooth, mandrel-bent curves to ensure exhaust gases flow without turbulence or restriction, directly translating to dyno-proven horsepower and torque gains.
  • Direct Fitment: Designed as direct bolt-on replacements for factory exhausts, ensuring straightforward installation for both cat-back systems and high-flow downpipes.

XForce Platform Spotlights

Find the exact XForce VAREX system engineered for your specific vehicle platform by linking directly to your filtered category pages:

VAG (VW Golf R, GTI & Audi S3): Eliminate the restrictive factory exhaust and take full control of your EA888 engine's tone with full VAREX cat-back systems here:

Ford Focus ST & Focus RS: Give your EcoBoost engine the aggressive roar it deserves, while keeping cold starts neighbor-friendly below:

Toyota GR86 & Subaru BRZ: Drastically improve the exhaust flow and sound of the FA24 Boxer engine with perfectly tuned mandrel-bent systems here:

Hyundai N Models: Upgrade the factory valved exhaust on your i20N or i30N to a full 3-inch high-flow XForce system for maximum pops and bangs below: 

Shop the full catalog of genuine XForce Valved Exhausts at JXL Performance to unlock absolute control over your car's sound and performance today.