Peterbilt 379 Exhaust Parts

Frequently Asked Questions About Peterbilt 379 Exhaust Parts

Will these exhaust parts fit my specific year Peterbilt 379?

Most of our Peterbilt 379 exhaust parts are designed to fit models from 1987 to 2007. However, there are some variations between early models (1987-1999) and later models (2000-2007), particularly in mounting bracket positions and pipe lengths. Always check the product description for specific year compatibility, or contact our team with your OEM number for verification. Extended hood models may require different stack lengths than standard hood configurations.

What's the difference between aluminized and chrome exhaust stacks?

Aluminized steel stacks offer good corrosion resistance at a lower price point and typically last 3-5 years depending on conditions. Chrome stacks provide superior shine and durability, lasting 7-10 years with proper care, but cost approximately 40-60% more. Chrome requires regular polishing to maintain appearance, while aluminized develops a matte finish over time. For trucks in harsh winter climates with heavy road salt exposure, chrome is often worth the investment.

Do I need special tools or professional installation for exhaust components?

Basic exhaust stack replacement typically requires standard hand tools including socket sets, wrenches, and potentially a reciprocating saw for removing old components. Most installations take 2-4 hours for experienced DIY mechanics. However, complete exhaust system overhauls involving manifolds or turbo connections should be performed by professionals due to precise torque specifications and potential warranty implications. Stack clamps and rain caps can usually be installed in under 30 minutes with basic tools.

What size exhaust stack should I choose for my 379?

The most common sizes for Peterbilt 379 trucks are 5-inch and 6-inch diameter stacks. Stock configurations typically use 5-inch, which provides adequate flow for most engines up to 500 HP. Six-inch stacks are recommended for high-performance builds over 500 HP or for the traditional aesthetic look. Stack height varies from 36 to 72 inches, with 48-60 inches being most popular. Consider your garage door clearance and state height restrictions when selecting length.

How do I prevent exhaust stack discoloration and maintain appearance?

Exhaust discoloration occurs from heat cycling and is normal, especially on chrome stacks near the base. To minimize bluing, ensure proper engine tuning and avoid extended idling. For chrome stacks, use specialized chrome polish monthly and apply heat-resistant wax after cleaning. Never use abrasive cleaners or steel wool on chrome. For aluminized stacks, mild soap and water work best. Installing heat shields between the stack and cab can reduce heat damage to paint and minimize discoloration in the lower stack sections.