Frequently Asked Questions About Peterbilt 389 Glider Exhaust Kits

What exhaust pipe diameter and configuration do I need for my Peterbilt 389 glider?

Most Peterbilt 389 gliders require 5-inch diameter exhaust systems, though some older engines may use 4-inch. The configuration depends on your engine placement and frame rail spacing. For CAT engines, you'll typically need a straight pipe setup, while Detroit engines often require curved or angled pipes. Measure your current system or check your engine specs to confirm the correct diameter. Dual exhaust setups are standard, with pipes running along both frame rails.

Will these exhaust kits fit my specific year and engine combination?

Our Peterbilt 389 glider exhaust kits are designed to fit 2007-2022 models with pre-emission engines. However, fitment varies based on your specific engine (CAT C15, Detroit Series 60, Cummins ISX, etc.) and wheelbase configuration. Extended hood models may require different pipe lengths than standard hoods. Always verify your wheelbase measurement and engine model before ordering. Contact our support team with your VIN if you're unsure about compatibility.

What's included in a complete exhaust kit, and what additional parts might I need?

A complete kit typically includes straight pipes or elbows, muffler (if not straight-piped), exhaust clamps, and mounting brackets. However, you may need to purchase separately: flex pipes for engine movement, rain caps, exhaust stacks, heat shields, and chrome or stainless steel tips. Gaskets and additional clamps might be required depending on your current setup. Some installations also require new hangers or modification of existing mounting points.

How difficult is the installation, and what tools are required?

Installation typically takes 3-6 hours for experienced mechanics. You'll need basic hand tools, a sawzall or pipe cutter for adjustments, jack stands or a lift, and potentially a welder for custom fitments. Common challenges include aligning pipes with existing mounting points and ensuring proper clearance from brake lines and air tanks. While many drivers complete this as a DIY project, first-time installers should budget extra time or consider professional installation, especially if modifications are needed.

What's the difference between aluminized steel and stainless steel options?

Aluminized steel kits cost 40-50% less than stainless steel and provide good corrosion resistance for 3-5 years under normal conditions. They're ideal for trucks in dry climates or those on a budget. Stainless steel kits resist rust indefinitely and maintain their appearance longer, making them worth the investment for trucks in salt-belt states or those wanting maximum longevity. Chrome-plated options are available for visible sections but require more maintenance to prevent pitting and discoloration.