Freightliner FL70-FL80 Chrome Stacks & Tops

Frequently Asked Questions About Freightliner FL70-FL80 Chrome Stacks & Tops

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

Chrome stacks are the exhaust pipe sections that route diesel exhaust from the engine up and away from the cab, while chrome tops (also called stack caps or rain caps) fit onto the top of the stack to keep rain, snow, and debris out of the exhaust system when the truck is idle. Together they form the visible exhaust stack assembly on your FL70 or FL80, combining a functional purpose with the classic chrome look many owners want.

Will these stacks and tops fit my specific FL70 or FL80 model year?

Exhaust stack diameter and length can vary depending on your truck's engine setup and original exhaust configuration, so it's important to check the listed dimensions against your current stack before ordering. If you're unsure, measuring your existing pipe's outer diameter and comparing it to the product specs is the best way to confirm a proper fit, or reach out to our team with your VIN or truck details for guidance.

What material and finish should I expect from these chrome stacks and tops?

Most stacks and tops in this category are constructed from stainless steel with a chrome-plated or polished finish, giving them durability against road grime and weather exposure while maintaining a reflective shine. Stainless steel resists rust better than plain steel, though regular washing and occasional polishing will help keep the chrome looking its best over time.

How difficult is it to install a new exhaust stack or top myself?

Installation typically involves removing the old stack section by loosening the clamp connecting it to the exhaust pipe or muffler outlet, then sliding the new stack into place and securing it with the same or a new clamp. Most stacks and tops are designed as a friction or slip fit, so no welding is usually required, though having a second person help support the stack while you tighten the clamp makes the job easier.

Do chrome exhaust stacks affect emissions compliance or DOT regulations?

Chrome stacks and tops are generally replacement or upgrade parts for the exterior exhaust piping and don't alter the engine's emissions control components, so they typically don't affect emissions compliance on their own. That said, exhaust height, placement, and any modifications should still meet DOT and state regulations for your specific application, so it's worth confirming local requirements before making changes to your exhaust setup.