Internal Mufflers

When you're on the road for long hours, every bit of sound reduction for your rig makes a difference. The constant background noise, or "drone," from the exhaust can go beyond irritating to distracting. Anything that distracts you is an issue not only of comfort but also of safety.

An internal muffler, also called a slide-in muffler, baffle, or stack muffler, reduces the exhaust sound in semis with stacks. At Truck Pipes USA, we offer a variety of high-quality internal mufflers for single or double stacks that improve your driving experience.

The Benefits of Internal Mufflers

Trucking is a tough job, and often an uncomfortable one. It's worth exploring the benefits you get with internal mufflers when deciding how to upgrade your rig to make life on the road easier.

Comfort

The main reason for adding an internal muffler to your exhaust setup is comfort. At highway speeds, semis with stacks produce a persistent vibration and humming sound called exhaust drone. You may seem to feel this sound as much as hear it as it resonates through your cab. 

Drone happens when low-frequency sound waves from the engine match those in the stack. The stacks act like an acoustic chamber, amplifying the noise. 

Internal mufflers are placed within the stacks to disrupt the sound waves. They generally have small holes or use baffles to move air around, dampening and absorbing the noise.

Legal Compliance and Practicality

Truckers, particularly those running with double stacks, may push the limits of federal and state noise regulations. Enforcement can be hit or miss, but you don't have to take that risk. An internal muffler can make the difference between expensive tickets and downtime and staying on the road.

For fleet managers, internal mufflers that make drivers more comfortable can help with employee retention. Potential clients may see quieter trucks as more professional. A company with a history of noise complaints can add internal mufflers to its fleet to improve its reputation.

Matching Internal Mufflers to Your Rig

If you have a dual stack, you must install two internal mufflers. Exhaust gases take the path of least resistance, so only installing one will force more air into the other. This imbalance can lead to significant exhaust backpressure, high exhaust gas temperatures, and significant engine damage.

You insert an internal muffler through the bottom of your exhaust pipe. Be careful to choose the right size to slide in properly. Manufacturers label internal mufflers for the fit, so if you have a 7" pipe, you need a 7" internal muffler.

Quality Matters for Stack Mufflers

When you upgrade your rig, you need products that stand up to the harsh conditions of the road and perform as expected. Trucks Pipes USA is your one-stop shop for high-quality IATF 16949:2016-compliant exhaust components. 

To reduce your downtime and enhance performance, inspect your exhaust system before choosing an internal muffler for your rig. Our wide selection means you can replace any damaged or rusted pipes, elbows, brackets, and other parts while you're installing your muffler. To find what you need or ask questions, call our US-based staff for friendly, knowledgeable help and information about our quick shipping.