Frequently Asked Questions About Peterbilt 567/579 Clamps, Brackets & Mounting

Will these clamps and brackets fit both my Peterbilt 567 and 579 models?

While the Peterbilt 567 and 579 share many similar mounting points, not all clamps and brackets are universal between the two models. The 567 typically has a set-forward axle configuration while the 579 has a set-back axle design, which can affect mounting locations. Always check the product description for specific model compatibility, and pay special attention to the model year range. Most universal brackets will clearly state "Fits 567/579" while model-specific parts will indicate the exact application.

What grade of stainless steel should I look for in mounting brackets?

For maximum durability and corrosion resistance, look for 304-grade stainless steel brackets and clamps. This grade offers excellent resistance to road salt, chemicals, and weather conditions. Some heavy-duty applications may benefit from 316-grade stainless, though this is typically overkill for most mounting needs. Avoid chrome-plated mild steel if you operate in harsh winter conditions or coastal areas, as the plating can chip and lead to rust. For brackets that will bear significant weight, ensure they have a minimum thickness of 3/16 inch.

Do I need special tools or professional installation for these mounting components?

Most clamps and brackets can be installed with standard hand tools including socket sets, wrenches, and drill bits. However, some installations may require drilling new holes in the frame rails, which demands precise measurements and proper drill bits for hardened steel. Frame-mounted brackets often require grade 8 bolts and proper torque specifications (typically 90-120 ft-lbs for frame bolts). If you're mounting heavy accessories or drilling into the frame, professional installation is recommended to maintain warranty coverage and ensure safety.

How do I determine the correct clamp size for my exhaust stacks and air cleaners?

Measure the outside diameter of your exhaust stack or air cleaner at the mounting point using a tape measure or calipers. Common sizes include 5-inch, 6-inch, and 7-inch diameters. Remember that clamps are sized by the pipe diameter they fit, not the clamp's overall dimension. For exhaust stacks, measure about 6 inches down from the top where the clamp will sit. If you're between sizes, choose the next size up and use rubber cushioning to ensure a tight fit without crushing the pipe.

What's the difference between weld-on and bolt-on mounting brackets?

Bolt-on brackets offer easier installation and the ability to remove or reposition accessories without permanent modifications to your truck. They typically use existing frame holes or require minimal drilling. Weld-on brackets provide a cleaner look and stronger mounting for heavy accessories but require professional welding and permanent modification. For most applications like light bars, CB antennas, and toolboxes, bolt-on brackets are sufficient. Reserve weld-on options for extremely heavy accessories or custom applications where maximum strength is critical.