Boost Performance & Cut Noise with Aftermarket Semi Truck Mufflers

Give your rig the power and sound it deserves with our lineup of semi truck mufflers built for heavy-duty performance. Whether you’re replacing a worn-out OEM muffler or upgrading to a high-flow system, we’ve got options that deliver results.

Why Upgrade Your Muffler?

A quality replacement muffler improves airflow, reduces backpressure, and cuts exhaust noise—without sacrificing power. Choose from quiet ride options or go for a performance sport muffler that boosts your sound and throttle response.

Top Benefits

- Better fuel efficiency with reduced exhaust restriction. - Lower decibel levels for a more comfortable ride. - Tough construction built for long hauls and extreme conditions. - Direct fit options to make installation simple and fast.

Shop by Style & Size

Our catalog includes: - 5-inch mufflers for semi trucks. - Galvanized and aluminized steel internals for corrosion resistance. - Internal muffler pipes and inserts for custom configurations. - Compact designs to fit tight clearances on various makes and models. Built for heavy duty trucks and available in universal fitments, these mufflers are ideal for owner-operators, fleet managers, or custom builders looking to improve their truck’s performance and reliability. Be sure to toss in some exhaust clamps and mounting brackets for more support.

Performance. Protection. Peace of Mind.

Whether you’re cruising cross-country or hauling local loads, your exhaust system matters. Shop online today at 4 State Trucks and explore the best aftermarket commercial truck mufflers available—backed by trusted brands and knowledgeable support.