Peterbilt 367 Mud Flaps

Frequently Asked Questions About Peterbilt 367 Mud Flaps

What material options are available for Peterbilt 367 mud flaps, and which holds up best for heavy-duty use?

Most Peterbilt 367 mud flaps come in three main materials: rubber, polymer composite, and stainless steel with rubber. Heavy-duty rubber flaps (typically 3/8" to 1/2" thick) are the most popular choice for durability and cost-effectiveness. They handle road debris, chemicals, and extreme temperatures well. Stainless steel-backed options provide extra rigidity and are ideal for severe service applications, though they cost more. Anti-sail polymer flaps reduce wind resistance but may crack in extreme cold below -20?F.

Will these mud flaps fit my specific year Peterbilt 367, and are there differences between model years?

Peterbilt 367 mud flaps are generally compatible across model years 2007-2021, as the frame rails and mounting points remained consistent. However, trucks with aftermarket modifications like lift kits, custom exhaust, or oversized tires may require adjustable brackets or longer flaps. Standard sizes are 24" x 30" for the rear and 24" x 24" for the front. Always measure your clearance from the bracket mounting point to the ground to ensure proper coverage without dragging.

How difficult is the installation, and what tools or additional hardware do I need?

Installation typically takes 30-45 minutes per set with basic tools. You'll need a drill with metal bits (if mounting new brackets), socket wrenches, and potentially a rivet gun. Most mud flap kits include brackets and hardware, but verify your truck's existing mounting points first. Some 367s have pre-drilled holes that make installation bolt-on simple. Common issues include needing longer bolts for thick brackets or having to relocate brackets due to aftermarket exhaust systems.

What's the difference between standard, anti-sail, and weighted mud flaps for highway versus off-road use?

Standard mud flaps work well for general highway use but can flap excessively at high speeds. Anti-sail flaps have angled slits or reinforced edges that reduce wind lift, making them ideal for long-haul highway driving. Weighted flaps (with bottom weights or steel inserts) hang straighter and work best for off-road or construction sites where maximum debris protection is needed. However, weighted flaps can increase wear on mounting brackets over time due to the extra mass.

How do I prevent mud flaps from tearing at the mounting holes, which seems to be a common failure point?

Mounting hole tears are usually caused by improper installation or worn brackets allowing excessive movement. Use wide washers or backing plates to distribute stress across a larger area. Check that brackets aren't bent and replace them if they show wear. Apply rubber conditioner quarterly to prevent dry rot around mounting points. Consider reinforced flaps with metal grommets or top rails if you frequently drive on rough terrain. Proper tension is key - flaps should hang naturally without being stretched tight.