Give your Freightliner SD 108, SD 114, or SD 122 the high-performance exhaust setup it deserves. Whether youâre upgrading your rig for better performance or replacing worn components, our in-stock lineup has the aftermarket exhaust parts that work as hard as your truck does.
Enhance Exhaust Flow & Chrome Tip Styles
Your Freightliner Severe Duty (SD) truck is made to handle tough conditionsâand your exhaust system needs to keep up. From DPFs and mufflers to elbows, clamps, and chrome stacks, every component here is built to maximize performance, reduce emissions, and hold up to long miles and rough routes.
Here's what you can find:
- DPFs & Mufflers:Control emissions and reduce engine noise
- Exhaust Clamps, Piping & Elbows:Secure your system with precision
- Chrome Stacks & Tips: Boost airflow and give your truck a bold look
- Mounting Hardware: Keep everything locked in tight
Why Upgrade Your Semi Truck Exhaust System?
- Improve fuel efficiency with better exhaust flow
- Reduce backpressure to extend engine life
- Stay compliant with current emission standards
- Boost performance and throttle response
- Add style with custom chrome stacks and tips
From daily work trucks to fully customized show rigs, these Freightliner SD 108â122 exhaust parts are ready to get the job done. Add some power mods to your upgrade by throwing in
Freightliner SD 108-122 engine performance parts. While under the hood, you can easily swap out
Freightliner SD heater and AC components, from heater hoses to O-rings. Whether youâre replacing, repairing, or customizingâ4 State Trucks has the parts to keep your SD series rig running strong and looking sharp.
Frequently Asked Questions About Freightliner SD 108-122 Exhaust Parts
Will these exhaust parts fit my specific Freightliner SD model year?
Our Freightliner SD 108-122 exhaust parts are designed to fit SD models from 2002 to 2011. The SD 108, 112, 114, and 122 models share the same exhaust mounting configurations during these years. However, always verify your specific truck's OEM and model number before ordering, as some special configurations may require different parts. If you're unsure, contact our team with your OEM for exact fitment confirmation.
What's the difference between aluminized and stainless steel exhaust components?
Aluminized steel exhaust parts offer good corrosion resistance at a lower price point and typically last 3-5 years under normal conditions. Stainless steel options cost more upfront but provide superior durability, lasting 7-10 years or longer, especially in harsh weather conditions or high-salt environments. For trucks operating in northern states or coastal areas, we recommend investing in stainless steel for long-term value.
Can I install these exhaust parts myself, or do I need a professional?
Most exhaust stack replacements and muffler installations can be completed with basic tools and mechanical knowledge. You'll typically need a socket set, penetrating oil for rusted bolts, and exhaust clamps. Stack installations usually take 1-2 hours, while complete system replacements may require 3-4 hours. The main challenges include dealing with rusted fasteners and properly aligning heavy components. Always use new gaskets and clamps during installation to prevent leaks.
What exhaust stack sizes and styles are available for the SD series?
We carry exhaust stacks in 5-inch and 6-inch diameters, with lengths ranging from 36 to 72 inches. Popular styles include straight chrome, curved chrome, and miter cut designs. Most SD trucks come with 5-inch systems from the factory, but can be upgraded to 6-inch with the proper adapter. Chrome stacks require regular polishing to maintain appearance, while stainless options need less maintenance but cost approximately 30% more.
How do I know when it's time to replace my exhaust components?
Replace exhaust parts when you notice excessive rust, holes, loud exhaust leaks, or significant discoloration. Black soot around pipe connections indicates leaks that reduce engine efficiency and may cause cab fumes. Mufflers typically need replacement every 4-6 years, while quality stacks can last 8-10 years with proper care. Regular inspection during oil changes helps catch problems early before they affect performance or create safety issues.
Freightliner SD 108-122 Chrome Stacks & Tops
Freightliner SD 108-122 Clamps, Brackets-Mounting
Freightliner SD 108-122 DPF & Mufflers
Freightliner SD 108-122 Elbows, Piping & Comp.
