Peterbilt 367 Chrome Stacks & Tops

Frequently Asked Questions About Peterbilt 367 Chrome Stacks & Tops

What exactly are chrome stacks and tops, and will they fit my Peterbilt 367?

Chrome stacks refer to the exhaust stack pipes that route exhaust up and away from the cab, while tops (also called stack caps or rain caps) are the chrome accessories that fit onto the top of the stack to keep moisture out and add a finished look. Products in this category are designed to fit the exhaust stack diameters commonly used on the Peterbilt 367, but you should always verify the outer diameter (OD) or inner diameter (ID) measurement of your existing stack against the product listing before ordering, since stack sizes can vary between trucks even within the same model.

What material are these stacks and tops made from, and how do they hold up over time?

Most chrome stacks and tops are constructed from stainless steel with a chrome-plated or polished finish. Stainless steel is used because it resists rust and heat better than standard steel, which is important given the constant exposure to exhaust heat and outdoor weather. That said, chrome finishes can dull or discolor over time from heat cycling and road grime, so regular cleaning and polishing will help maintain the shine longer.

Do I need to weld or modify anything to install a new stack or top?

In most cases, no welding is required. Exhaust stacks typically slip-fit or clamp onto the existing exhaust piping and are secured with clamps, while tops or caps simply slide or bolt onto the top of the stack. However, if you are replacing a stack with a different diameter or length than what was originally installed, you may need additional adapters or brackets, so it is worth double-checking fitment specs before you buy.

Will adding chrome stacks affect my truck's emissions compliance or exhaust performance?

Chrome stacks and tops are generally cosmetic and functional exhaust routing components rather than emissions control devices, so they do not typically interact with emissions systems like DPF or SCR. However, altering stack height, diameter, or adding certain rain cap styles can affect backpressure or exhaust flow, so it is a good idea to stick with sizing similar to your factory setup unless you are working with a shop familiar with exhaust modifications.

What is the difference between the various top or cap styles offered?

Stack tops come in a few common styles, including plain bevel-cut tops, curved or "west coast" turn-down tops, and flip-style or hinged rain caps that open when exhaust flows and close when the engine is off to block rain and debris. The style you choose is largely a matter of appearance preference and how much rain protection you want, since all styles are designed to direct exhaust safely away from the cab.