Freightliner SD 108-122 Chrome Stacks & Tops

Frequently Asked Questions About Freightliner SD 108-122 Chrome Stacks & Tops

What exactly are chrome stacks and tops, and what do they do?

Chrome stacks are the vertical exhaust pipes that run up the back or side of the cab, while tops (also called stack caps or rain caps) fit onto the top of the stack to keep water and debris out of the exhaust system while the truck is parked or idling. Together they route exhaust away from the cab and add a polished, finished look to the truck.

Will these stacks and tops fit my Freightliner Columbia or Coronado SD 108/122?

These stacks and tops are designed to fit the Freightliner SD 108 and 122 series (Columbia and Coronado models), but exhaust systems can vary by diameter, length, and mounting configuration depending on the truck's model year and factory setup. Always check the listed diameter and length specs against your current exhaust setup before ordering, and measure your existing stack if you're unsure.

What material and finish options are available?

Most stacks and tops in this category are made from stainless steel with a mirror-polished chrome finish, which resists corrosion and holds up well to road grime and weather. Some tops are available in curved, straight, or turbine styles, so you can match the look of your rig or replace a damaged section with a similar profile.

Can I install these myself, or do I need a shop to do it?

Many owner-operators install stacks and tops themselves using basic hand tools, especially when replacing a section with the same diameter and clamp style. However, because the stacks connect to the exhaust system and are mounted at height, some drivers prefer having a shop handle the install to ensure proper clamping, alignment, and a secure fit. If you're not familiar with your truck's exhaust routing, professional installation is a safer bet.

How do I keep the chrome looking good and prevent rust or discoloration?

Regular washing with a mild soap and water, followed by a dedicated chrome polish, will help maintain the shine and prevent heat discoloration or road salt buildup. Since these stacks are exposed to high exhaust temperatures, some bluing or darkening near the top is normal over time and isn't usually a sign of a defect. Avoid harsh abrasive cleaners, which can dull the polished finish.