Key Features and Specifications
Product Highlights
- GFX-Specific Engineering: Flared T304 stainless steel pipe ends designed exclusively for the Camaro SS GFX Package exhaust outlet configuration
- Loud, Deep V8 Sound: 8/10 loudness, always-present aggressive muscle car tone at every throttle level
- Straight-Through Muffler Design: Maximum exhaust gas flow for improved performance and throttle response
- No Tips Required: GFX-specific design integrates directly with the factory GFX rear fascia
- Compatible with ZL1 and 1LE: Fits GFX-equipped performance packages as well as standard SS.
- H-Pipe Upgrade Path Available: Pairs with MRT After-Cat H-Pipe (Part #92A801) for full cat-back performance
- DIY-Friendly Installation: All hardware included; approximately 60-minute install
- No Tuning Required: Direct bolt-on upgrade
- Free Shipping: Complimentary delivery on all orders
Technical Specifications
- Material: Corrosion-resistant T304 stainless steel throughout
- Tube Diameter: 2.5-inch mandrel-bent
- Pipe Ends: Flared T304 stainless steel for GFX factory fitment
- Tips: Not required, GFX configuration
- Muffler Design: Straight-through for reduced backpressure
- Loudness Rating: 8/10
- Drone Rating: 2/10 (noticeable but tolerable)
- Performance Rating: 8/10
- Compatibility: 2010–2015 Camaro SS, ZL1, 1LE with GFX Package (coupe and convertible), 6.2L V8
- Does Not Fit: Camaro SS without GFX Package (use Part #91A175); Camaro V6
Sound Characteristics
What You Can Expect to Hear
- Idle & Cold Start: Deep, commanding V8 presence from the first start, immediately more aggressive and characterful than the factory exhaust
- City & Neighborhood Driving: An always-on loud, deep muscle car rumble that turns heads and commands attention at every block
- Acceleration: A strong, aggressive V8 performance note with real bite and a deeper growl that the stock mufflers completely suppress
- Wide Open Throttle: Full Version 1 performance sound, a loud, muscular V8 roar that makes clear what's under the hood
- Highway Cruising: Drone is noticeable but tolerable at cruise speeds; the 2/10 drone rating reflects a manageable highway resonance for enthusiast drivers
- Overall Character: Loud, aggressive, and always present, the exhaust for the GFX Camaro SS owner who wants maximum sound presence without delay
Warranty and Quality Assurance
Limited Lifetime Warranty Coverage
MRT backs every GFX Version 1 Axle-Back with a limited lifetime warranty against defects in materials and workmanship. For as long as you own your 2010–2015 Camaro SS GFX, your exhaust system is fully covered.
Why Choose the MRT Camaro SS GFX Version 1 Axle-Back?
The Only Axle-Back Engineered Specifically for the Camaro SS GFX Package
The factory GFX Package on the Gen 5 Camaro SS uses a different rear fascia and exhaust outlet configuration than the standard SS. Most aftermarket axle-backs are designed for the non-GFX SS and will not fit correctly on a GFX-equipped car without modifications. The MRT Version 1 GFX Axle-Back eliminates that problem entirely; it's engineered from the ground up for the GFX configuration, with flared T304 stainless steel pipe ends that match the factory GFX exhaust connections precisely for a direct, no-hassle bolt-on installation.
GFX Camaro SS owners no longer have to settle for generic parts that require fitment workarounds. This is the system built for your specific car.
Loud, Deep V8 Character, Always On
The Version 1 sound profile means this exhaust doesn't hide. From idle to wide-open throttle, the GFX Axle-Back delivers a loud, deep muscle car tone that makes the 6.2L V8 sound the way it looks- aggressive and commanding. The system is louder than MRT's Version 2, with more rasp and character under load, giving the Camaro SS GFX the exhaust note that a car carrying this visual package deserves.
Whether you're pulling out of a parking lot, cruising a boulevard, or opening it up on a backroad, the Version 1 is always present and always engaging. This is the axle-back for SS owners who want their car to get noticed every single time.
Axle-Back Performance, Real Gains, Fast Install
An axle-back replacement targets the rear section of the exhaust system, making it the quickest and most straightforward upgrade path for the GFX Camaro SS. MRT's straight-through muffler design and 2.5-inch mandrel-bent tubing reduce restriction in the rear section compared to the factory mufflers, delivering improved exhaust gas flow, a noticeable boost in throttle response and performance, and a meaningful reduction in exhaust weight. Installation takes approximately 60 minutes with common hand tools, no welding, no modifications, and no tuning required.
Upgrade Path: Add the MRT H-Pipe for Full Cat-Back Performance
The GFX Version 1 Axle-Back pairs directly with MRT's After-Cat H-Pipe (Part #92A801) for the 2010–15 Camaro SS. Adding the H-pipe replaces the factory mid-section X-pipe with MRT's signature H-pipe design, unlocking full cat-back-level performance and an even deeper, richer exhaust tone across the entire system. If you want to start with the axle-back and step up later, the upgrade path is already built in.
T304 Stainless Steel
Every component of the GFX Version 1 Axle-Back is handcrafted using corrosion-resistant T304 stainless steel throughout. More than 35 years of OE and aftermarket exhaust engineering experience informs every design decision, and in-house manufacturing ensures consistent fitment, weld quality, and finish from every unit that ships. A limited lifetime warranty backs the entire system.
How does it sound? The MRT Camaro SS: GFX Axle-Back #91A178 has a loud, deep muscle car sound.
Is there drone or resonance? The drone is noticeable but tolerable.
What if I step on it? Wide-open throttle increases exhaust loudness and tone to an aggressive performance sound.
