Your Peterbilt 386 is built to work hard. So donât 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 strongerâwhile giving your truck a sharp, custom look.
Why Upgrade Your Peterbilt 386 Exhaust System?
Your exhaust system does more than push out fumes. Itâs key to reducing backpressure, managing toxic emissions, and keeping your engine running efficiently. Consider improving under-the-hood cooling by throwing in some
Peterbilt 386 AC parts or a
Pete 386 transmission upgrade. And if you want more power, better fuel economy, or just a tougher soundâa comprehensive exhaust system upgrade is the way to go.
Our aftermarket exhaust parts for the 386 are made for heavy duty, commercial use. Theyâre built to last and engineered to perform.
What's Included?
From under the hood to above the cab, weâve 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, youâll find dependable parts that match your rigâs 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 bestâwhether itâs 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, weâve got the quality replacement parts and performance kits to match.
Frequently Asked Questions About Peterbilt 386 Exhaust Parts
What years does the Peterbilt 386 exhaust system fit, and are there different configurations I need to know about?
Peterbilt 386 exhaust parts are designed for model years 2005-2015. However, there are important variations to consider: pre-2008 models typically use a different mounting bracket configuration than 2008-2015 models. Additionally, day cab and sleeper cab configurations may require different stack lengths and elbow angles. Always verify your specific truck's VIN and configuration before ordering to ensure proper fitment.
What's the difference between aluminized and chrome exhaust stacks, and which one lasts longer?
Aluminized steel exhaust parts feature an aluminum-silicon coating that provides good corrosion resistance at a lower price point, typically lasting 3-5 years depending on conditions. Chrome exhaust stacks offer superior corrosion resistance and a mirror-like finish but come at a higher cost, often lasting 7-10 years with proper maintenance. For trucks operating in harsh winter conditions with road salt exposure, chrome is generally the better long-term investment.
Can I install these exhaust parts myself, or do I need special tools and equipment?
Most Peterbilt 386 exhaust components can be installed with standard hand tools, including wrenches, sockets, and a torque wrench. However, you'll likely need exhaust clamps (typically 5-inch for standard applications), high-temperature exhaust sealant, and potentially new gaskets. Stack installation usually requires two people due to weight and positioning. Plan for 2-4 hours for a complete system replacement, depending on your experience level.
Why are there different elbow angles available, and how do I know which one I need?
Elbow angles for Peterbilt 386 exhaust systems typically come in 45, 60, and 90-degree options. The correct angle depends on your stack placement and cab configuration. Sleeper cabs often use 45 or 60-degree elbows to direct exhaust away from the sleeper, while day cabs may use 90-degree elbows for a more vertical stack position. Measure your current setup or consult your truck's exhaust diagram to determine the proper angle.
What diameter exhaust pipe do I need, and will aftermarket parts affect my engine performance?
Most Peterbilt 386 models use 5-inch diameter exhaust systems, though some high-horsepower configurations may use 6-inch systems. Using the correct diameter is crucial for maintaining proper exhaust backpressure and engine performance. Switching to a larger diameter without proper engine tuning can actually reduce low-end torque. Always match your replacement parts to your original equipment specifications unless you're doing a complete performance upgrade with appropriate engine modifications.
Peterbilt 386 Chrome Stacks & Tops
Peterbilt 386 Clamps, Brackets & Mounting
Peterbilt 386 DPF & Mufflers
Peterbilt 386 Elbows, Piping & Comp.
