What You'll Learn:
- The most effective methods to achieve a deeper, throaty exhaust note.
- The difference between "loud" and "deep" tone quality.
- How to choose the right Sierra exhaust for your specific sound goals.
- Real-world examples of sound differences on GM trucks.
Key Takeaways:
- Increasing pipe diameter and upgrading mufflers are key to deepening sound.
- Cat-Back™ systems offer the best balance of volume, depth, and performance.
- Borla’s T-304 stainless steel construction enhances sound resonance and durability.
- You can achieve aggressive volume without the annoyance of highway drone.
If you drive a V8-powered GMC Sierra or Chevy Silverado, you likely have one complaint: it’s too quiet. From the factory, manufacturers stifle the natural roar of the engine to appeal to the "average" commuter. But for truck enthusiasts, the goal is often finding that signature American V8 rumble.
If you are searching for how to make your truck exhaust sound deeper, you are in the right place. Here are the most frequently asked questions about unlocking the true voice of your truck.
Q: What actually makes a truck exhaust sound deeper?
A: Creating a deeper tone isn't just about removing parts; it’s about engineering the flow of sound waves. A deeper tone is achieved through three main changes:
- Increased Pipe Diameter: Larger pipes allow exhaust pulses to expand, which lowers the frequency of the sound waves, creating a deeper "baritone" note compared to the higher-pitched "tenor" of stock pipes.
- Straight-Through Muffler Design: Factory mufflers use baffles and chambers that trap sound and create backpressure. A high-performance Cat-Back Exhaust System typically uses straight-through, perforated cores that allow sound to pass through while absorbing high-frequency rasp, leaving only the deep power notes.
- Material Quality: Believe it or not, the metal matters. Thin, cheap steel can sound "tinny." Premium T-304 stainless steel has dense acoustic properties that help resonate a richer, fuller sound.
Q: What are my options for a GMC Sierra or Silverado exhaust upgrade?
A: Since the Sierra and Silverado share the same platform, the upgrade paths are similar. If you are looking for a specific Sierra exhaust, the best approach is a full system replacement to maximize that deep tone.
Borla offers three specific sound technologies for these trucks, designed to cater to different depth requirements:
- Touring: The deepest, smoothest growl. It eliminates the stock whisper without being overly aggressive.
- S-Type: A deep, throaty roar that opens up significantly when you step on the gas.
- ATAK®: The loudest option, but still engineered to maintain a deep, non-distorted tone.
You can find the specific fitment for your truck year and engine size here: GMC Sierra 1500 Exhaust Systems.
Q: Can I hear the difference between these sound levels?
A: Absolutely. Describing sound is difficult, but hearing it makes the choice easy. Watch this video comparison to hear how a Borla system transforms the character of the GM truck platform:
Q: Will making my exhaust deeper cause "Drone"?
A: This is the most common fear for truck owners. "Drone" is that annoying, vibrating hum that fills the cabin at highway speeds (usually around 1,800–2,000 RPM).
Many budget exhaust kits achieve "deep" sound simply by removing mufflers, which almost always results in drone. Borla systems are different. We use patented Polyphonic Harmonizer technology and tuned resonators to isolate and cancel out the specific frequencies that cause drone. This means you get the deep, aggressive external sound you want, but your cabin remains quiet enough for a conversation or a phone call.
Q: Does a performance exhaust withstand off-road abuse?
A: If you use your truck like a truck, durability is key. A deep-sounding exhaust is useless if it rusts out in two years.
Borla systems are built from T-304 austenitic stainless steel, inside and out. This material is superior to the T-409 steel or aluminized steel used by the factory and many competitors. Whether you are towing a boat or heading off-grid, your exhaust is built to handle the heat and the elements.
Check out how other owners rig up their trucks with Borla on our Truck Lifestyle page.
Q: Is the GMC Sierra or Silverado exhaust installation a difficult DIY project?
A: We design our systems to be a direct bolt-on upgrade, making the Silverado or Sierra exhaust installation a straightforward job for the driveway mechanic. Unlike universal kits that require welding, Borla systems utilize precise mandrel bends that align perfectly with factory hanger locations. With basic hand tools, you can typically complete the installation without the need for cutting or welding (on most wheelbase configurations), instantly upgrading your truck's sound and performance.
