The 4 State Trucks Blog

When it comes to Peterbilt 379 factory-style exhaust muffler setups versus performance straight pipe exhaust (no muffler), the choice comes down to style preference.  Here's what you'll learn: The pros and cons of aftermarket Peterbilt 379 stacks with a straight pipe versus factory-style exhaust stacks with a muffler.  Keep in mind, if you want stay 100% DOT-compliant in 48/50 states, stick with the factory exhaust muffler setup for your Peterbilt 379. No modifications, no risk.  …

Replacing exhaust stacks on a Peterbilt 379 is a bit easier than some other truck models, the installation process can still be time-consuming and tedious.  If you're an owner-operator installing new exhaust parts in your garage. Get ready.  Because a single faulty piece of hardware could be the difference between an over-the-weekend DIY-installation that takes a few hours or several weeks!  Looking to avoid all of that? This guide is here to help.  Here are the 9 most common …