Peterbilt 330/335/337 Mud Flaps

Frequently Asked Questions About Peterbilt 330/335/337 Mud Flaps

What are the exact mounting dimensions and will these mud flaps fit my specific year model?

Our Peterbilt 330/335/337 mud flaps are designed to fit models from 2005 to present. The standard mounting brackets accommodate the factory mounting points with 24-inch width configurations for single rear wheels and 30-inch for dual rear wheels. For 2005-2010 models, you may need additional bracket adapters due to slight frame variations. We recommend measuring your current setup or contacting us with your OEM for exact fitment confirmation.

What material options are available and how long do they typically last?

We offer three material grades: standard rubber (1/4 inch thick), heavy-duty rubber (3/8 inch thick), and anti-sail polymer composite. Standard rubber typically lasts 2-3 years under normal conditions, heavy-duty extends to 3-5 years, while anti-sail polymer can exceed 5 years. The anti-sail option includes stiffening ribs that prevent flapping at highway speeds, reducing wear and improving fuel efficiency.

Do I need special tools or professional installation?

Installation typically takes 30-45 minutes per side with basic hand tools. You'll need a drill with 3/8 inch bit, socket wrench set, and possibly a rivet gun if your truck doesn't have existing mounting holes. Most customers complete the installation themselves, though some older models may require minor bracket modifications. All necessary hardware and detailed instructions are included with each set.

What's the difference between OEM replacement and aftermarket universal mud flaps?

OEM replacement mud flaps match factory specifications exactly, including mounting hole patterns and bracket angles specific to Peterbilt 330/335/337 models. Universal options require more adjustment during installation but offer greater customization for lifted trucks or non-standard configurations. OEM replacements typically provide better fit and finish, while universal options cost 20-30% less but may require additional brackets or drilling.

How do weighted mud flaps compare to standard ones for these medium-duty trucks?

Weighted mud flaps include a 2-3 pound steel or rubber weight bar at the bottom edge, keeping them hanging straight even at highway speeds. This is particularly beneficial for Peterbilt 330/335/337 trucks used in delivery or stop-and-go applications where standard flaps tend to curl or flip. The added weight increases protection coverage by 15-20% but may cause slightly more frame stress over time. We recommend weighted options for trucks frequently operating above 55 mph or in windy conditions.