CAPS & COVERS

Caps & Covers For Peterbilt Trucks

From hub covers and lug nut covers to mirror caps and exhaust stack rain caps, protective covers perform both functional and cosmetic roles on Peterbilt trucks. Stainless and chrome covers protect wheel-end components from road grime and corrosion while giving the truck a polished look. Functional covers — like breather caps, filler caps, and port covers — keep contaminants out of critical systems. We carry a wide range of caps and covers for Peterbilt trucks across cab, chassis, and drivetrain applications.

Frequently asked questions about caps & covers

Do hub covers and axle covers provide any functional benefit beyond appearance?

Yes. Hub covers and axle covers reduce the accumulation of road grime and moisture around the hub and bearing area, making wheel-end inspections cleaner and faster. On oil-lubricated hubs, a good hub cover also helps contain minor seepage and makes it easier to spot an actual seal leak versus surface contamination. Stainless covers are popular with owner-operators who take pride in their equipment's appearance and resale value.

What is a rain cap and why does my exhaust stack need one?

A rain cap sits at the top of the vertical exhaust stack and prevents rain and debris from entering the exhaust system when the truck is parked. Water in the exhaust can cause rust and, in rare cases with DPF-equipped trucks, contribute to filter contamination. Rain caps are spring-loaded and open automatically under exhaust backpressure when the engine is running.

Are chrome and stainless covers compatible with all Peterbilt models?

Fitment varies by model, year, and whether the truck has single or dual rear wheels. Hub cover diameter and pilot bore dimensions differ between axle makes — Meritor, Dana, and Hendrickson hubs all have different specs. Always verify the axle make, hub type, and wheel configuration before ordering decorative covers to ensure proper fitment.

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