The 2021 relaunch of the Ford Bronco was one of the most anticipated moments in modern automotive history. Whether you drive a two-door weekend warrior or a four-door family hauler, the Bronco’s 2.3L or 2.7L EcoBoost engine has the bones to be a genuinely thrilling machine. But straight from the factory, the exhaust system is doing your Bronco no favors. It is quiet, restrictive, and built to meet baseline standards rather than to perform.

An MRT exhaust is one of the most impactful, cost-effective upgrades you can make to a 2021+ Ford Bronco. It improves sound, unlocks performance, and is engineered specifically for the demands of off-road driving. Here is everything you need to know.

Why the Factory Bronco Exhaust Falls Short

Ford’s stock exhaust on the 2021+ Bronco is made from T409 stainless steel and is designed primarily to be quiet and compliant. That means a more restrictive flow path, a muted exhaust note, and a cap on the performance your EcoBoost engine is capable of delivering.

MRT’s aftermarket exhaust systems address all of this directly. They use 2.5″ T304 stainless steel tubing, which is a higher grade than OEM and provides superior corrosion resistance, especially important for a vehicle that regularly encounters mud, water crossings, and harsh trail conditions. The larger tube diameter reduces backpressure, improves exhaust gas flow, and gives the engine room to breathe the way it was meant to.

MRT Ford Bronco Exhaust Systems: The Full Lineup

MRT offers several distinct exhaust options for the 2021+ Ford Bronco, each tuned to a different sound profile and use case. All of them fit both 2-door and 4-door models with the 2.3L and 2.7L EcoBoost engines (note: these systems do not fit the Ford Bronco Sport or Bronco Raptor, which have dedicated options).

King of the Hill G.O.A.T. Series Exhaust (Part 90R231)

The G.O.A.T. stands for Greatest Over Axle Turndown, and that name tells you exactly what you are getting. This is the Elite Series exhaust for Bronco owners who want an untamed, raw exhaust note that matches the vehicle’s legendary off-road character.

The over-axle turndown design is not just about aesthetics. It routes the exhaust pipe up and over the rear axle, which maximizes ground clearance and keeps the tow hitch fully accessible. That is a genuinely functional design for anyone who uses their Bronco the way it was intended. Handcrafted from 2.5″ T304 stainless steel, it rates a loudness of 8 out of 10 with minimal drone (1 out of 10) and a performance score of 8 out of 10. Installation takes about 60 minutes and requires no tune.

An optional ORV Flag Mount can be added directly through the product page for an additional layer of trail functionality and visibility.

Trail Rated G.O.A.T. Series Exhaust (Part 90R233)

If you want serious performance and a great sound without going full-aggressive, the Trail Rated G.O.A.T. is the sweet spot. Ford’s Bronco was built for adventure, and this exhaust system enhances both performance and sound while remaining ideal for drivers who balance trail use with daily driving.

This system is particularly well suited for those looking to increase performance and towing capacity. Like the King of the Hill variant, it uses the over-axle turndown design for maximum clearance and hitch access, and it is built from 2.5″ T304 stainless steel. It runs on both the 2.3L and 2.7L EcoBoost and fits both body styles. No tune is required.

For those who want to step up to an even more aggressive tone, MRT recommends pairing or upgrading to the King of the Hill G.O.A.T., which removes the mid-muffler for a louder, more rugged exhaust character.

King of the Hill Axle Back with Single Tip (Part 90R234)

For Bronco owners who want the signature MRT aggressive sound with a cleaner, single-exit look, the King of the Hill Single Tip axle back is a compelling choice. It delivers the same performance benefits of the larger-diameter T304 stainless steel construction with a polished or black tip finish that upgrades the rear appearance of the vehicle.

King of the Hill Axle Back with Dual Tips (Part 90R238)

This is the system MRT designed for the Bronco enthusiast who wants the loudest, most aggressive sound and a visual upgrade to match. The dual 3.5″ stainless steel tips are available in either bright polish or a Black Ops matte finish, replacing the factory single-exit exhaust with a dual-exit setup that makes a statement.

The straight tube design opens up exhaust flow, improves gas scavenging, and produces that deep rumble and purr at every throttle position. This one is street-ready and trail-ready. Installation is DIY-friendly and takes roughly 60 minutes with no tune required.

Trail Rated Axle Back (Part 90R236)

For the Bronco driver who wants a sport performance sound that builds to a full-on aggressive note at wide-open throttle, the Trail Rated Axle Back hits the mark. It has a noticeable but tolerable level of drone, making it well suited for daily drivers who still want to feel the performance on the weekends.

How an MRT Exhaust Improves Your Bronco’s Performance

More Horsepower and Better Throttle Response

The stock Bronco exhaust restricts exhaust flow. MRT’s larger-diameter T304 stainless tubing reduces that restriction, allowing exhaust gases to exit faster and more efficiently. The result is improved horsepower and torque across the RPM range, with particularly noticeable gains in throttle response. The exact performance improvement varies depending on whether other engine modifications are in place, such as cold air intakes, tunes, or intercooler upgrades, but the exhaust upgrade is consistently one of the most foundational performance mods you can make.

Better Fuel Efficiency

A more efficient exhaust system means the engine does not have to work as hard to push spent gases out of the cylinders. Under normal driving conditions, this can translate to modest improvements in fuel economy. The Bronco’s EcoBoost engine already uses turbocharging to maximize efficiency, and a free-flowing exhaust complements that design by reducing pumping losses.

A Sound That Matches the Machine

This is the upgrade most Bronco owners notice first. The factory exhaust was engineered to be quiet. MRT exhaust systems are engineered to sound like what the Bronco actually is: a capable, powerful off-road SUV with a turbocharged engine that deserves to be heard. Depending on the system you choose, you get anything from a deep sport rumble (Trail Rated) to a bold, aggressive growl (King of the Hill). All systems are designed to be satisfying without being obnoxious or droning on the highway.

Ground Clearance and Trail Functionality

The G.O.A.T. over-axle designs provide real-world trail benefits. Routing the exhaust up and over the axle keeps the exit point high and away from rocks, stumps, and terrain obstacles. The tow hitch remains fully accessible, which matters if you are hauling gear or using a receiver-mounted accessory.

Beyond the Exhaust: Other MRT Bronco Exhaust Upgrades

MRT does not stop at exhaust systems. While you are upgrading, two additional accessories are worth adding to your build.

Ford Bronco No-Drill Hood Struts

The factory Bronco uses a hood prop rod, which is a minor but persistent inconvenience when you are checking fluids on the trail or doing engine maintenance. MRT’s no-drill hood struts use the factory attachment points to automatically lift and hold the hood open without any vehicle modifications or drilling required. It is a small upgrade with a big quality-of-life payoff.

MRT ORV Flag Mount Kit

Visibility on the trail matters. The MRT ORV Flag Mount Kit is designed specifically for the Bronco and allows you to mount a flag for signaling, safety, or style. It pairs directly with the G.O.A.T. exhaust systems, and MRT offers a discount when you bundle them together through the product page.

FAQs: About Ford Bronco Exhaust Upgrades

Does an MRT exhaust require a tune on a 2021+ Ford Bronco?

No. All MRT exhaust systems for the 2021+ Bronco are designed to be tune-free. You can install and drive without any changes to the ECU or aftermarket tune.

Will an MRT exhaust trigger a check engine light?

MRT systems are engineered to be check-engine-light-free when installed correctly. The Bronco Raptor H-pipe systems include valve motion control plates to ensure compatibility with the factory exhaust valve system.

What is the difference between the Trail Rated and King of the Hill exhaust?

The Trail Rated series delivers a sport performance sound that is more refined and suitable for daily driving, with a louder note at full throttle. The King of the Hill series is louder and more aggressive under all driving conditions and is the better choice for drivers who want maximum sound and trail presence. The King of the Hill G.O.A.T. also removes the mid-muffler for an even more rugged tone.

Does the MRT Bronco exhaust fit both 2-door and 4-door models?

Yes. The axle back and G.O.A.T. exhaust systems are compatible with both 2-door and 4-door 2021+ Ford Broncos equipped with the 2.3L or 2.7L EcoBoost engine. They do not fit the Bronco Sport.

How long does it take to install an MRT exhaust on a Ford Bronco?

Most MRT Bronco exhaust systems are designed for DIY installation in approximately 60 minutes. No cutting is required, and the systems use clamp-on designs for a clean, tool-friendly install.

Can I upgrade just the axle back, or do I need a full cat-back system?

MRT offers axle-back systems for the Bronco, which replace the rear section of the exhaust from the axle back. These deliver significant sound and performance improvements on their own. For maximum performance gains, a full cat-back system provides even greater exhaust flow improvement.

What makes T304 stainless steel better than the factory T409 exhaust?

T304 is a higher grade of stainless steel with superior corrosion resistance compared to the T409 used in Ford’s stock exhaust. For a vehicle that regularly encounters water, mud, salt, and harsh trail environments, T304 provides better long-term durability.

The 2021+ Ford Bronco is one of the most exciting vehicles to come out of Detroit in decades. An MRT exhaust is one of the best ways to make it sound and perform the part. Whether you are a trail-focused off-roader who needs ground clearance and durability or a street driver who wants an aggressive exhaust note and better throttle response, MRT has a system built for your Bronco.

Explore the full lineup of Ford Bronco exhaust systems at shopmrt.com.