BAKFlip MX4 TS Hard Folding Tonneau Cover for 2020-2026 Chevrolet Silverado & GMC Sierra 2500/3500 HD (6'9" Bed)

The 2020-2026 Silverado and Sierra 2500/3500 HD are working heavy-duties, and the MX4 TS matches them with a rack-ready hard cover for the 6'9" bed. Pipe, conduit, ladders, or a bed rack ride up top on the integrated T-slot rails while power tools and materials stay locked and dry under the aluminum fold. The Multi-Shield finish resists scratches up to 11X better, and the rails clamp on with no drilling in under 30 minutes.

What's Included:

• (1) BAKFlip MX4 TS folding cover assembly
• (2) Clamp-on mounting rails
• (1) Tailgate seal
• (1) Hardware and clamp kit
• (1) Installation guide

Features

Integrated T-Slot Rails, Rack-Ready
The MX4 TS carries factory-integrated T-slot rails down both sides, so the cover comes rack-ready out of the box. Drop in cross bars, cargo holders, kayak and bike mounts, tie-downs, or a bed rack and haul up top while the bed stays covered and locked underneath. Racks and accessories are sold separately.

Heavy-Duty Aluminum, 22 Percent Stronger
Redesigned aluminum top panels ride over high-density polymer cores for a rigid, secure deck that is about 22 percent stronger than the original MX4, resisting cuts, prying, and dents while staying light enough to fold with one hand.

Multi-Shield Coating, 11X More Scratch Resistant
A specialty Multi-Shield automotive coating makes the matte-black surface up to 11X more durable against scratches and scuffs, so the low-profile cover keeps its clean look through years of daily use.

100% Bed Access in Seconds
The panels fold flush against the cab, opening the entire bed for pallets, appliances, or a dirt bike, then fold back and auto-latch closed. It is the only hard fold that keeps your third brake light visible in every position.

Weathertight Sealing and Drainage
Re-engineered perimeter seals and tight-fit clamps block rain, dust, and spray edge to edge, and an integrated drainage system channels water off the cover and out of the bed so cargo stays dry.

Automatic Latching Security
Re-engineered panels latch down automatically the moment the cover closes, with improved resistance to forced entry over the Gen 2 design. With the tailgate shut and locked, the bed cannot be opened from outside.

No-Drill Click-In Install, 400 lb, Made in the USA
The all-new click-in clamps cut install time by about 12 percent and need no drilling, so the rails go on in under 30 minutes with hand tools. The closed cover holds 400 lb evenly distributed and is assembled in the USA (Missouri) with a 5-year warranty and US-based support.

MX4 Line-Up Comparison

How the BAKFlip MX4 TS (Gen 3) compares within its BAK family:

Fitment & Compatibility

Specifications

• Cover type: BAKFlip MX4 TS hard folding (tri-fold) tonneau cover with integrated T-slot rails
• Material: Heavy-duty aluminum top panels with high-density polymer cores, aluminum side rails and frame
• Finish: Textured matte black with Multi-Shield coating (up to 11X more scratch resistant)
• Rack compatibility: Integrated T-slot rails accept cross bars, bed racks, cargo holders, and tie-downs (sold separately)
• Bed length: 6'9" (81")
• Bed access: 100%, folds flush against the cab
• Weight capacity: 400 lb evenly distributed on the closed cover
• Sealing: EPDM perimeter seals, tight-fit clamps, integrated water drainage
• Security: Automatic latching panels, locks with the tailgate closed
• Drilling required: No, clamp-on rails
• Install time: Under 30 minutes, one person
• Assembled in: USA (Missouri)
• Warranty: 5-year limited

Installation

Type: Bolt-on, clamp-in, no drilling  ·  Time: Under 30 minutes  ·  Tools: Basic hand tools  ·  Difficulty: One-person, DIY-friendly

The all-new click-in clamps attach to your factory bed rails with no cutting, trimming, or drilling. Set the two rails on the bed rails and level them, lower the folded cover into place and connect the click-in clamps, then close the tailgate and adjust the perimeter and tailgate seals. Most installs finish in under 30 minutes with basic hand tools. Watch the model-specific install video above and follow the printed iSheet for clamp placement and torque.

Watch the model-specific installation walkthrough:

Resources

Everything you need for your BAKFlip MX4 TS Hard Folding Tonneau Cover for 2020-2026 Chevrolet Silverado & GMC Sierra 2500/3500 HD, in one place.

• Official BAKFlip MX4 TS Hard Folding Tonneau Cover for 2020-2026 Chevrolet Silverado & GMC Sierra 2500/3500 HD installation guide (PDF), the manufacturer's step-by-step guide covering mounting, included hardware and adjustment.

Warranty, Shipping & Returns

Warranty. 5-Year Limited Warranty from BAK / RealTruck against defects in materials and workmanship, backed by US-based product experts. It does not cover accident damage, neglect, or improper installation.

Free shipping. This item ships free to the lower 48 states. Because it is an oversized item, it ships by freight and typically arrives in 3 to 7 business days.

Inspect on delivery. Please inspect the packaging before signing. If you see any damage, note it on the delivery receipt and contact us right away, and we will make it right.

About BAK Industries

BAK Industries has engineered premium truck bed covers in the USA for decades and is a flagship tonneau brand of RealTruck, one of the largest truck-accessory manufacturers in North America. Its hard-folding BAKFlip and retractable Revolver lines set the benchmark for the category, pairing heavy-duty aluminum construction with a low-profile, weathertight design.

Every BAK cover is built for real-world truck use: no-drill, clamp-on installation that mounts in about 30 minutes, full bed access when folded or rolled back, and reinforced latching that keeps cargo secure and dry. The lineup runs from the value-focused BAKFlip MX4 and G2, to the flagship FRP-panel F1 and FiberMax, to the industrial Revolver X2 and X4s roll-ups, covering nearly every popular truck and bed length.

Backed by US-based product support and a multi-year manufacturer warranty, a BAK cover is a buy-it-once upgrade that protects tools, cargo, and gear while giving a truck a cleaner, more finished look.