Peterbilt 357/378 Exhaust Parts

Thinking of replacing a worn-out exhaust part, enhancing your look with chrome stacks, or doing a complete exhaust system overhaul? Our aftermarket diesel exhaust components are ready to help your rig breathe better, sound stronger, and last longer.

Why Upgrade Your 357/378 Semi Truck Exhaust System?

The exhaust system isn’t just about noise—it’s about power, efficiency, and engine protection. A well-maintained or upgraded exhaust: - Improves airflow and reduces backpressure - Boosts fuel economy and throttle response - Lowers exhaust gas temps (EGTs) - Extends engine performance life - Adds a clean, aggressive look with chrome or black stacks Whether you're running a vocational setup with a 357 or hauling freight in a 378, better exhaust means better performance. Help your exhaust with superior under-the-hood airflow with AC parts for your Peterbilt 357/378 or upgrade your Peterbilt 357/378 engine performance components. What You'll Find in This Lineup: Our Peterbilt 357/378 exhaust collection includes: - Chrome exhaust stacks: Straight, miter, curved, or flat tops to match your rig’s personality - Exhaust piping & elbows: Smooth mandrel bends for efficient flow - Mufflers: Quiet things down without choking performance - Diesel Particulate Filters (DPF): Reduce emissions while keeping your truck compliant - Clamps, hangers & brackets: Keep your system tight and rattle-free - Complete exhaust kits: Everything you need to replace or upgrade in one go
These parts are built from heavy-duty steel or stainless steel, designed to resist corrosion, vibration, and extreme heat. So whether you're customizing for show or replacing for everyday use, you're getting durability you can count on.

Make Your Exhaust Work Harder (and Look Better)

From rugged job sites to long highway runs, your truck’s exhaust system is working nonstop. Upgrading with high-quality aftermarket parts gives you: - Better airflow = more power - More efficient emissions control - That bold, polished big rig look to stand out on the road
We stock direct-fit parts for Peterbilt 357 and 378 models. That means less time fighting with modifications and more time on the road. Plus, we carry universal and customizable options so you can dial in the exact look and function you're going for.