Keep your Peterbilt 330/335/337 in top shape with our frame crossmembers and covers! From heavy-duty crossmembers to durable fiberglass or stainless steel covers, these parts reinforce and protect your truck's frame. Perfect for replacements or upgrades, they ensure long-lasting performance and a sleek look. Get reliable solutions to maintain your truck's strength and style! A quality set of Frame crossmembers provides a mounting point for critical components like the suspension, engine, and transmission. Installing quality frame covers protects your investment from exposure to the elements, even damage caused by road hazards or debris. If you have a weak frame and need to replace the part, this product lineup has affordable replacement options. Once a crossmember on your Peterbilt is weakened or damaged, you'll have plenty of difficulty steering, braking, and controlling your rig. At 4 State Trucks, we know the importance of getting quality frame crossmember parts.