Frequently Asked Questions About Peterbilt 330/335/337 Clamps, Brackets & Mounting

Will these clamps and brackets fit my specific Peterbilt 330, 335, or 337 model year?

Most clamps and brackets for Peterbilt 330/335/337 models are compatible across years 2005-2021, as these trucks share similar frame dimensions and mounting points. However, there are some variations between early models (2005-2010) and later models (2011-2021), particularly in exhaust stack mounting locations and air cleaner bracket designs. Always check the product description for specific year ranges, and when in doubt, provide your VIN number to our customer service team for verification.

What material options are available, and which holds up best against rust and corrosion?

We offer clamps and brackets in three main materials: powder-coated steel, stainless steel, and chrome-plated steel. Stainless steel (typically 304 grade) provides the best long-term corrosion resistance, especially in salt-heavy regions. Powder-coated steel offers good protection at a lower price point but may require touch-ups after 3-5 years. Chrome-plated options provide a mirror finish but can pit or peel if the chrome layer is compromised. For maximum durability, we recommend stainless steel for exhaust and underhood applications.

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

Most clamps and brackets can be installed with standard hand tools including socket wrenches, combination wrenches, and screwdrivers. Exhaust stack clamps typically require 9/16" or 5/8" sockets, while most frame brackets use 3/4" or 7/8" hardware. Installation usually takes 30-60 minutes per component. However, some heavy-duty frame brackets or custom mounting solutions may require drilling, which needs a quality drill with cobalt bits. Always use a torque wrench for final tightening - most brackets require 45-65 ft-lbs depending on bolt size.

What's the difference between OEM and aftermarket clamps and brackets for these models?

OEM clamps and brackets are exact replacements with factory-spec materials and finishes, typically priced 40-60% higher than aftermarket options. Quality aftermarket brands like Grand General, United Pacific, and Buyers Products often use the same or better materials (like upgrading from mild steel to stainless) while maintaining proper fitment. The main differences are usually in finish quality and minor dimensional variations. Aftermarket options often provide better value, especially for common items like exhaust clamps, mirror brackets, and light mounting hardware.

How do I know what size clamp I need for my exhaust stack or air intake?

Exhaust stack clamps for Peterbilt 330/335/337 models typically come in 5-inch and 6-inch diameters, with 5-inch being standard on most factory configurations. Measure the outside diameter of your stack at the mounting point - not at the tip. Air intake clamps usually range from 3.5 to 4 inches. Band-style clamps provide more adjustability (usually +/- 0.25 inches) compared to U-bolt style clamps. If you're between sizes or have an aftermarket exhaust system, choose the adjustable band-style clamp in the next size up for the best fit.