Peterbilt 389 Elbows, Piping & Comp.

Frequently Asked Questions About Peterbilt 389 Elbows, Piping & Comp.

What is included in this category?

This category covers exhaust system components for the Peterbilt 389, including exhaust elbows, straight and curved piping sections, and related fittings used to route exhaust gases from the engine or muffler up through the stack. These parts are used to repair, replace, or customize the exhaust system on your truck.

Will these parts fit my specific Peterbilt 389 setup?

Exhaust elbows and piping can vary by diameter, angle, length, and material, so it is important to check the listed specifications against your truck's current exhaust configuration before ordering. If you are unsure about a specific fitment, comparing the measurements of your existing component or checking with one of our parts specialists can help confirm you are getting the correct piece.

What materials are these elbows and piping made from, and does it matter?

Exhaust components are commonly available in aluminized steel or stainless steel. Aluminized steel offers good heat and corrosion resistance at a lower cost, while stainless steel typically provides longer-lasting corrosion resistance and a brighter, more polished appearance. Your choice often comes down to budget, desired appearance, and how long you want the component to last under regular use.

Can I install these parts myself, or do I need a professional?

Many drivers and shop technicians replace exhaust elbows and piping themselves, since the job typically involves loosening clamps or unbolting flanges, removing the old section, and fitting the new one in its place. However, working at height near the stack or dealing with rusted or seized fittings can make the job more difficult, so if you are not comfortable with the process, having a qualified technician handle the installation is a reasonable option.

How do I know when it's time to replace an elbow or piping section?

Common signs that a piece needs replacing include visible rust-through, cracking, loose or damaged clamp points, unusual exhaust leaks or noise, or physical damage from road debris or impact. Regularly inspecting your exhaust system for these issues can help you catch problems early and avoid more costly repairs down the line.