Have Questions?
Professional-grade parts used trackside.
Expert help during business hours.
Encrypted checkout & trusted payments.
Orders ship quickly from regional warehouses.
The BAK BAKFlip MX4 (GEN 3) is the latest evolution of the world’s best-selling truck bed cover, designed to enhance durability, security, and weather resistance for your pickup. Constructed primarily from high-strength alloy materials, including heavy-duty aluminum top panels and side rails reinforced with high-density polymer cores, this tonneau cover offers a 22 percent increase in overall strength over the previous model. Its robust construction ensures long-lasting performance under demanding conditions. The MX4's sleek, textured matte black finish provides a modern aesthetic that complements your truck’s profile while offering resistance to scratches and corrosion. With a flush-mounted design, the cover sits seamlessly with your truck’s bed rails, maintaining a low profile that enhances aerodynamics and appearance. The cover folds in a multi-panel configuration, allowing full access to the bed or quick partial access while maintaining security and weather protection. The re-engineered automatic latching system ensures that the cover securely locks when closed, providing peace of mind in all situations. Reinforced with improved lock components, the MX4 (GEN 3) offers enhanced resistance to forced entry, protecting your cargo effectively. Weatherproofing is further optimized with revised EPDM rubber perimeter seals and tight-fit clamps, providing superior protection against water seepage and dust ingress, even during heavy rain or snow. An extra-long dual-action tailgate seal enhances weather resistance at the rear, ensuring your truck bed remains dry and your cargo safe. The innovative design maintains full factory tailgate functionality regardless of the cover’s position, offering convenience without sacrificing security. Easy installation is a key feature, with a new click-in design that allows a single person to complete setup in less time. The cover can be folded against the cab for full bed access, providing versatility for various hauling needs. Additional features include precision-engineered aluminum side rails and frame, integrated water drainage system, and re-engineered prop rod clips for secure hold. Capable of supporting up to 400 pounds when evenly distributed, the MX4 (GEN 3) is built for both strength and reliability. Suitable for 6-foot 6-inch beds on Chevy Silverado, GMC Sierra, and similar trucks from 1988 to 2014, this cover is assembled in Missouri and backed by a 5-year warranty, making it a trusted choice for truck owners seeking premium protection and style.
Features:
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
