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The HEMI V8 is the heartbeat of American performance. Whether you are piloting a 392 Scat Pack or a 717-horsepower Hellcat, the factory exhaust note is just a preview of what these machines are capable of. From the factory, Dodge muffles the raw, visceral grunt of the 6.2L and 6.4L engines to satisfy the masses.

For the enthusiast, "satisfactory" is a failure. You want the roar. You want the crackle on the downshift. You want to feel the vibration in the seat of your pants.

This is the definitive guide to Mopar exhaust upgrades. We are breaking down the science of sound, the reality of performance gains, and the heavy hitters in the aftermarket industry. If you are ready to stop blending in and start dominating the street, read on.

The Mid-Muffler Delete: The Gateway Mod

The most common question in the Mopar community is whether to start with a mid-muffler delete. It is the most cost-effective way to increase volume. By removing the restrictive "suitcase" mufflers located in the middle of the car and replacing them with straight pipes or high-flow resonators, you instantly wake up the HEMI.

The Pros

• Cost: It is a fraction of the price of a full catback system.
• Volume: Significant increase in decibels, especially under Wide Open Throttle (WOT).
• Weight: You shed roughly 20-30 pounds of dead weight.

The Cons

• Drone: This is the dealbreaker. At highway speeds (2,000–3,000 RPM), the cabin can become a resonance chamber.
• Refinement: It sounds loud, but it doesn't always sound "good." It can be raspy and unrefined compared to an engineered system.

For those who want a professional build, a mid-muffler delete is a temporary fix. For a permanent solution, you need an engineered catback.

Catback Systems: Engineered for Excellence

A full catback system replaces everything from the catalytic converters back to the tips. This is where engineering meets raw power. Brands like AWE and Borla spend hundreds of hours in R&D to ensure that the exhaust note is aggressive outside the car but civil inside the cabin.

Select Your Flow: Axle-back vs. Catback

If you are strictly hunting for a change in tone at the rear of the vehicle, an axle-back might suffice. However, if you are looking to optimize the airflow of a Hellcat or Redeye, a full catback is non-negotiable. High-performance engines require high-performance exit paths.

AWE vs. Borla: The Heavyweight Battle

When you shop DTX Performance, you are looking for the best. In the Mopar world, the debate usually narrows down to two titans: AWE Tuning and Borla Performance.

AWE Tuning: The Drone Killers

AWE has revolutionized the Mopar market with its patented 180 Technology®. This isn't just a muffler; it’s a sound cancellation device. As exhaust gases pass through ports into reflection chambers, sound waves bounce off the walls and cancel out specific frequencies that cause drone.

• AWE Track Edition: This is for the rowdy. It is raw, loud, and un-muffled. It is the lightest option but offers no sound cancellation.
• AWE Touring Edition: The perfect balance. It features the 180 Technology, giving you a deep, muscular tone without the headache-inducing drone on long cruises.

Borla Performance: The Gold Standard

Borla offers three distinct sound levels, allowing you to tailor the volume to your specific taste.

• Borla Touring: Slightly louder than stock. Perfect for sleepers.
• Borla S-Type: The classic HEMI sound. Deep, rich, and aggressive when you step on it.
• Borla ATAK: Addictive Tall Audio Knight. This is the loudest street-legal system Borla makes. It is crisp, high-decibel, and designed to turn heads three blocks away.

The Active Exhaust Challenge

Modern Chargers and Challengers (2015+) come equipped with Active Exhaust Valves (AES). These valves open and close based on your drive mode (Street, Sport, Track). When you upgrade your exhaust, you have to decide what to do with these valves.

• Active Valve Retaining: Systems from Borla and AWE allow you to move your factory actuators onto the new exhaust. This keeps your drive modes functional.
• Valve Simulators: If you choose a system that deletes the valves entirely (like the AWE Track Edition), you must use electronic simulators to prevent a Check Engine Light (CEL).

Push your performance further by ensuring your electronics match your hardware. A Mopar in limp mode is a paperweight.

Header Wars: Completing the Build

If you are chasing maximum horsepower on a Hellcat or a Scat Pack, the catback is only half the story. The factory manifolds are a bottleneck.

Kooks vs. Stainless Works

Upgrading to Long Tube Headers is the ultimate power move.

• Kooks Headers: Known for precision fitment and high-grade stainless steel. They offer massive gains in the mid-range and top-end.
• Stainless Works: Built for the drag strip. Their "Legend" or "Redline" series headers provide a unique growl and the durability to handle high-boost applications like the Redeye.

Thermal Management and Support

Increased power and aggressive driving lead to one thing: Heat. High-performance exhaust systems move heat out of the engine faster, but your cooling system needs to keep up. While you are upgrading your Mopar's breathing, don't forget the fluids.

For those pushing their vehicles to the absolute limit: especially in heavy-duty or towing scenarios: check out our specialized cooling solutions in the DTX Performance product catalog. Keeping your HEMI cool is just as important as keeping it loud.

Why Precision Matters

Building a Mopar isn't just about bolting on the loudest parts you can find. It is about synergy. An exhaust that is too large can lose backpressure and hurt low-end torque. An exhaust that is too small will choke out your supercharger.

At DTX Performance, we focus on high-performance outcomes. We only stock brands that meet our rigorous standards for fitment, finish, and flow.

Shop With Confidence

We know the Mopar platform inside and out. Whether you are looking for the refined growl of a Borla S-Type or the track-ready scream of an AWE system, we have the inventory to get you to the finish line.

• Select the system that matches your goals.
• Build a machine that commands respect.
• Drive with the authority of a HEMI.

Summary of the Best Mopar Exhaust Options

Final Verdict: Which One Should You Buy?

If you want the absolute best experience for a daily-driven Scat Pack or Hellcat, go with the AWE Touring Edition. The drone-canceling technology is a game-changer for the ZF 8-speed transmission's shift points.

If you want the most aggressive, "look-at-me" sound possible without sacrificing quality, the Borla ATAK is your winner. It provides a specialized acoustic note that sounds more like a precision-tuned race car than a traditional muscle car.

Build your dream setup today. Browse our full selection of aftermarket exhaust systems and take the first step toward reclaiming your car's true voice. We promise to only send you the good things: no fluff, just performance.

Still have questions? Our team of experts is ready to help you select the perfect headers, mid-pipes, or catback systems for your specific VIN. Contact us now and let's get that HEMI breathing.