Peterbilt 386 Exhaust Parts

Your Peterbilt 386 is built to work hard. So don’t let a worn-out or underperforming exhaust system hold it back. Our selection of aftermarket semi truck exhaust parts helps your diesel engine breathe easier, run cleaner, and sound stronger—while giving your truck a sharp, custom look.

Why Upgrade Your Peterbilt 386 Exhaust System?

Your exhaust system does more than push out fumes. It’s key to reducing backpressure, managing toxic emissions, and keeping your engine running efficiently. Consider improving under-the-hood cooling by throwing in somePeterbilt 386 AC parts or a Pete 386 transmission upgrade. And if you want more power, better fuel economy, or just a tougher sound—a comprehensive exhaust system upgrade is the way to go. Our aftermarket exhaust parts for the 386 are made for heavy duty, commercial use. They’re built to last and engineered to perform.

What's Included?

From under the hood to above the cab, we’ve got the exhaust components you need to replace or upgrade: - Exhaust Manifolds: Route exhaust away from the engine with solid, heat-resistant construction. - Performance Turbochargers: Reclaim exhaust pressure to boost engine power and improve throttle response. - Exhaust Pipes & Elbows:Direct flow with precision bends and stainless or aluminized steel options. - Diesel Oxidation Catalysts (DOC): Break down carbon monoxide and hydrocarbons. - Diesel Particulate Filters (DPF): Trap soot and protect the environment (and your warranty). - Selective Catalytic Reduction (SCR): Cut NOx emissions using DEF. Essential for newer emissions systems. - Mufflers: Tone down the rumble without restricting your exhaust flow. - Exhaust Stacks & Tips: Top it off with polished chrome stacks or blackout finishes. Go with straight, mitered, or curved tips for the look you want.
Every part is engineered for semi truck durability. Whether you're replacing a cracked manifold or upgrading to a full aftermarket exhaust kit, you’ll find dependable parts that match your rig’s specs. Need a better look too? Chrome stacks and powder-coated tips give your 386 that custom edge.
We carry all the support hardware and finishing pieces that bring your exhaust system together: Clamps and brackets; Heat shields; Gaskets and seals; Flex pipes and mounting kits. No guesswork. Just direct-fit parts you can install and get rolling.

Shop the Best Replacement Exhaust Parts Online

Your Peterbilt 386 diesel truck deserves the best—whether it’s a full system overhaul or a quick component swap. At 4 State Trucks, we make it easy to shop aftermarket exhaust parts online with confidence. So if you're ready to upgrade your exhaust stacks, DPF, muffler, or piping, we’ve got the quality replacement parts and performance kits to match.