8-5 Inch Exhaust Stacks

Frequently Asked Questions About 8.5 Inch Exhaust Stacks

What size stack does my truck need, and does 8.5 inch refer to the inside or outside diameter?

The 8.5 inch measurement typically refers to the outside diameter (OD) of the stack. It is important to measure your existing exhaust pipe or stack before ordering to confirm you need an 8.5 inch OD replacement or add-on piece, since stacks are also commonly available in 5, 6, and 7 inch sizes. Always check the fit of the stack against your current exhaust system or elbow before purchasing.

What materials and finishes are these stacks available in?

Exhaust stacks in this category are commonly available in aluminized steel, stainless steel, and chrome-plated finishes. Chrome and stainless options offer a brighter, more reflective look and generally hold up well against road grime, while aluminized steel is a budget-friendly option that still resists heat and corrosion. The right choice often comes down to the look you want combined with how much upkeep you are willing to do to maintain the finish.

Will an 8.5 inch stack fit my specific make and model of truck?

Fitment depends on your truck's existing exhaust system diameter, mounting configuration, and the length of stack you need. Many stacks are sold as universal-fit pieces designed to slip over or into existing pipe, rather than being model-specific. Double-check the listed dimensions, wall thickness, and connection style against your current setup, and reach out to our team if you are unsure before buying.

How do I install a new exhaust stack, and can I do it myself?

Most exhaust stacks are designed for straightforward installation using clamps or slip-fit connections onto your existing exhaust pipe or elbow. Many truck owners install these themselves with basic tools, though you will want to make sure the stack is cut to the correct length, properly aligned, and securely clamped to avoid leaks, rattling, or the stack coming loose while driving. If you are not comfortable with the installation or need modifications like cutting or welding, a professional shop can help ensure a secure fit.

Are there height, noise, or emissions regulations I should be aware of when replacing my exhaust stack?

Yes, exhaust stack height, positioning, and emissions equipment can be subject to state and federal regulations, and rules can vary depending on where you operate. Any changes to your exhaust system should maintain proper emissions equipment function and comply with applicable noise ordinances and DOT requirements. We recommend checking your local and federal regulations before making modifications to ensure your truck stays compliant.