If you own a 2007 or newer GMC Sierra, you’re driving one of America’s most capable trucks. But even the best vehicles benefit from performance upgrades that unleash hidden potential. One of the most effective modifications you can make is upgrading to an MRT performance exhaust system—a change that delivers measurable horsepower gains, enhanced torque, improved throttle response, and an aggressive exhaust note that turns heads.
Understanding Exhaust Flow and Horsepower Gains
The factory exhaust system on your GMC Sierra is designed with cost efficiency, noise reduction, and emissions compliance in mind. While adequate for everyday driving, these systems create significant restrictions that limit your truck’s true performance capabilities. Stock exhausts typically feature narrow piping, restrictive mufflers, and multiple bends that increase back pressure—forcing your engine to work harder to expel exhaust gases.
When exhaust gases can’t exit efficiently, your engine’s cylinders face residual pressure during the exhaust stroke. This resistance reduces efficiency, meaning each combustion cycle produces less power. By reducing back pressure through a high-flow exhaust system, you allow your engine to breathe freely, resulting in tangible horsepower and torque improvements.
MRT exhaust systems maximize flow through key design features. The use of 3-inch mandrel-bent tubing ensures consistent diameter throughout the entire exhaust path—unlike crush-bent factory pipes that create flow-restricting crimps. This mandrel-bending process maintains full internal diameter, allowing exhaust gases to flow with minimal turbulence and maximum velocity.
MRT’s Engineering Advantage: 35+ Years of Expertise
MRT Performance brings over 35 years of OE and automotive engineering experience to every exhaust system they craft. This background means they understand how to engineer systems that optimize the delicate balance between sound quality, performance gains, and daily driveability.
Each MRT exhaust undergoes rigorous quality inspections during manufacturing, ensuring every component meets the highest standards. These handcrafted systems are fabricated from premium T304 stainless steel, offering superior corrosion resistance compared to aluminized steel used in many factory exhausts. This material choice means your MRT exhaust maintains appearance and performance for years, even when exposed to harsh weather and road salt.
Cat-Back Systems: Performance Meets Easy Installation
For GMC Sierra owners looking to improve horsepower without extensive modifications, cat-back exhaust systems represent the ideal solution. A cat-back system replaces everything from after the catalytic converter to the rear tip, including the muffler, mid-pipes, and tailpipe. This delivers substantial performance improvements while maintaining emissions compliance—crucial for those needing to pass state inspections.
MRT offers two primary cat-back exhaust systems for 2007- present GMC Sierras with the 5.3L V8 engine, each designed for different preferences and driving styles.
MRT Deep & Mellow Cat-Back: Refined Power
The GMC Sierra Deep & Mellow Cat-Back exhaust system is engineered for drivers wanting noticeable performance gains and enhanced exhaust note without overwhelming volume. This system produces a deep and mellow rumble, particularly impressive during acceleration, yet remains comfortable during highway cruising and daily commuting. The chambered muffler design allows excellent flow while incorporating sound-tuning technology that minimizes drone—that annoying resonance that makes long drives fatiguing.
This system is ideal for urban environments, work sites, and situations where you want assertive performance without excessive sound. You’ll notice improved throttle response, enhanced mid-range torque for towing, and a satisfying exhaust note that announces your Sierra’s presence without disturbing the neighborhood.
- 07-18 GMC Sierra MRT Deep & Mellow Cat Back Exhaust
- 2019+ GMC Sierra 1500 MRT Deep & Mellow Cat Back Exhaust
MRT ToughTruck Cat-Back: Maximum Aggression
For Sierra owners wanting the most aggressive exhaust presence possible, the ToughTruck Cat-Back system delivers uncompromising performance and sound. This is MRT’s loudest Sierra exhaust, featuring a get-noticed tone at idle that transitions to a lively growl with serious bite under acceleration. The system features 3-inch mandrel-bent tubes throughout, maximizing flow and reducing back pressure for optimal horsepower gains.
The ToughTruck system delivers an impressive exhaust note without being obnoxious. You can hear gear changes, there’s strong presence at steady-state cruising, and burbles during deceleration. The system includes a 4-inch double-wall polished stainless steel tip with beveled edges. For those seeking a distinctive appearance, MRT offers a “Black Ops” custom black ceramic finish option.
Despite aggressive sound, the ToughTruck features minimal drone, allowing comfortable long-distance driving. The straight-through resonator design ensures loudness when desired without excessive cabin noise during highway cruising.
Real-World Performance Improvements
MRT exhaust systems consistently deliver measurable improvements that translate to noticeable real-world benefits:
Improved Throttle Response: Reduced back pressure means quicker engine response to throttle inputs, making your Sierra feel more eager in everyday driving.
Enhanced Towing Capability: Additional torque, particularly mid-range, makes towing trailers and boats noticeably easier. Your transmission won’t downshift as frequently on hills.
Better Fuel Efficiency: Improved exhaust flow can lead to modest fuel economy improvements during highway driving.
Long-Term Engine Health: Reducing back pressure decreases operating temperatures and stress on internal components, potentially contributing to longer engine life.
DIY-Friendly Installation for Hobbyists and Mechanics
MRT designs exhaust systems that enthusiasts with basic mechanical skills can install. Every cat-back system is a true bolt-on replacement, using factory mounting points and requiring no welding. Systems fit your GMC Sierra as if factory-installed, with precise bends and hardware aligning perfectly with existing locations.
Most Sierra owners complete installation in 2-3 hours using common tools: jack and stands, wrenches, sockets, and penetrating oil. MRT provides detailed instructions on each product’s page, and their YouTube channel features installation videos and demonstrations walking you through the process.
This DIY approach saves you at least $400 in professional installation costs while providing satisfaction of upgrading your truck yourself. If you’re near Plymouth, Michigan, MRT offers professional installation at their facility.
The MRT Difference: American Craftsmanship
MRT takes pride in handcrafting every exhaust system in America using domestic materials and skilled labor. This commitment ensures superior quality control, supports domestic jobs, and allows rapid communication for questions or support.
T304 stainless steel—premium marine-grade material—resists rust and corrosion far better than standard exhaust metals. Mandrel-bent tubing maintains structural integrity, creating smooth internal surfaces promoting optimal flow. Welded joints are executed by experienced craftsmen creating leak-free, durable connections lasting your truck’s lifetime.
Sound Quality: Character Beyond Volume
Many manufacturers focus solely on volume, creating systems that are loud but lack character. MRT’s 35+ years of sound engineering allows them to design systems delivering carefully crafted exhaust notes enhancing your Sierra’s personality.
The Deep & Mellow produces deep, rumbling bass with minimal high-frequency harshness—muscular sound that’s impressive without being shrill. The ToughTruck adds mid-range presence and higher-frequency content, creating an aggressive bite that truck enthusiasts crave. Both minimize drone through careful resonator design and pipe length, ensuring enjoyment without fatigue during long drives.
Making Your Sierra Stand Out
The GMC Sierra is one of America’s best-selling trucks, meaning thousands on the road. An MRT exhaust upgrade effectively differentiates your Sierra from stock trucks while improving performance. The visual impact of a 4-inch polished tip or stealthy Black Ops finish adds a custom touch, while enhanced exhaust note ensures people know your Sierra isn’t just another work truck.
Unleash Your Sierra’s True Potential
Upgrading your 2007 or newer GMC Sierra with an MRT performance exhaust represents one of the best modifications you can make. The combination of measurable horsepower gains, enhanced throttle response, improved sound, and straightforward installation makes these systems outstanding value for enthusiasts.
Whether you choose the refined Deep & Mellow or maximum aggression of ToughTruck, you’ll experience the difference from engine startup. Your Sierra will feel more responsive, sound more impressive, and deliver the driving experience reminding you why you chose America’s workhorse.
With MRT’s commitment to quality craftsmanship, American manufacturing, and customer satisfaction, your exhaust upgrade will deliver years of reliable performance. Visit MRT’s website to explore their full lineup, watch sound demonstrations on the MRT YouTube channel, or contact their team at (734) 455-5807 to discuss which system suits your truck. It’s time to unleash your Sierra’s full potential with an MRT Performance Exhaust today.
FAQs About MRT Exhaust Upgrades for GMC Sierra
How much horsepower can I expect to gain from an MRT exhaust system on my GMC Sierra?
MRT exhaust systems deliver noticeable horsepower gains. The actual gains depend on several factors including your truck’s current condition, elevation, air temperature, and whether you’ve made other performance modifications. Beyond the raw numbers, you’ll notice improved throttle response that makes your Sierra feel more responsive in everyday driving situations. The enhanced exhaust flow reduces back pressure throughout the RPM range, with the most noticeable improvements occurring in the mid-range power band where you spend most of your time during normal driving, towing, and hauling. These gains are achieved while maintaining your truck’s emissions compliance, as cat-back systems preserve the factory catalytic converters.
Will an MRT exhaust system void my GMC Sierra’s factory warranty?
Installing an MRT cat-back exhaust system should not void your entire vehicle warranty under the Magnuson-Moss Warranty Act, which protects consumers from blanket warranty denials due to aftermarket parts. However, dealerships can deny warranty claims for specific components if they can prove the aftermarket part caused the failure. Since MRT cat-back systems replace only the exhaust components downstream from the catalytic converters and don’t modify engine management systems or emissions controls, they’re unlikely to affect warranty coverage for engine, transmission, or other unrelated components. If you’re concerned about warranty implications, keep your factory exhaust system so it can be reinstalled if needed for dealership service. Many Sierra owners install MRT systems without any warranty issues whatsoever, as the modifications are bolt-on and don’t alter vehicle systems in ways that could cause component failures.
What’s the difference between the MRT Deep & Mellow and ToughTruck cat-back systems?
The primary difference between these two MRT systems lies in their sound profiles and volume levels. The Deep & Mellow cat-back produces a deep rumble that’s ideal for drivers who want a noticeable performance exhaust note without excessive volume. It’s perfect for urban driving, work environments, and situations where you want enhanced sound without disturbing neighbors or drawing unwanted attention. The ToughTruck cat-back is MRT’s most aggressive Sierra exhaust, delivering maximum volume with a get-noticed tone at idle and a lively, biting growl under acceleration. You’ll hear gear changes, experience strong presence at steady-state cruising, and enjoy burbles during deceleration. Both systems feature 3-inch mandrel-bent tubing, straight-through muffler designs, and T304 stainless steel construction, so performance gains are comparable. The choice ultimately comes down to your sound preferences and how you use your truck.
Is professional installation required, or can I install an MRT exhaust system myself?
MRT designs all their exhaust systems specifically for DIY installation by hobbyists with basic tools and skills. These are true bolt-on systems that use factory mounting points and require no cutting, or fabrication. Most Sierra owners can complete the installation in 2-3 hours using common hand tools including a jack and jack stands, socket set, wrenches, and penetrating oil for frozen bolts. MRT provides detailed instructions on each product’s page and offers installation videos on their YouTube channel that walk you through every step of the process. The systems are precision-engineered to fit perfectly, aligning with existing hangers and mounting locations just like the factory exhaust. This DIY-friendly design saves you at least $200-400 in professional installation costs while giving you the satisfaction of upgrading your truck yourself. However, if you prefer professional installation or are located near Plymouth, Michigan, MRT offers installation services at their facility.
How do MRT exhaust systems minimize drone while still providing an aggressive sound?
Drone—the annoying resonance frequency that occurs at certain RPM ranges, typically during highway cruising—is one of the biggest complaints about aftermarket exhaust systems. MRT addresses this issue through sophisticated sound engineering developed over 35+ years of exhaust design experience. Their systems utilize carefully calculated pipe lengths, strategic resonator placement, and specific muffler chamber designs that cancel out problematic frequencies before they enter the cabin. The straight-through muffler design allows for excellent flow (maximizing horsepower gains) while incorporating internal baffles and sound-tuning technology that specifically target drone frequencies. The mandrel-bent tubing also contributes to drone reduction by eliminating the flow disruptions and turbulence created by crush-bent pipes. The result is an exhaust system that delivers an impressive, aggressive sound when you accelerate but settles into a comfortable tone during steady-state cruising. Many MRT customers specifically praise the minimal drone characteristics, noting they can enjoy long highway drives and road trips without the fatigue associated with constant exhaust resonance in the cabin.
Leave a Reply