BAKFlip Revolver X4S Tonneau Cover
The BAKFlip Revolver X4S combines aluminum-reinforced panels with our signature roll-up design, giving you the protection of a hard cover and the access of a soft roll. We built it for drivers who need full bed access without removing the cover every time.
Each panel features a heavy-duty aluminum slat wrapped in industrial-grade vinyl, delivering impact resistance while staying light enough to operate single-handed. The X4S locks securely at the tailgate and rolls forward smoothly on our proprietary track system, so you can load tall cargo in seconds.
Revolver X4S specifications
Aluminum-Reinforced Panel Construction
We engineer every Revolver X4S panel around a rigid aluminum slat that runs the full width of your truck bed. The slat sits between two layers of 24-ounce industrial vinyl, bonded with commercial-grade adhesive that won’t delaminate in summer heat or winter cold.
The aluminum adds lateral stiffness without the weight penalty of a solid hard cover—each panel weighs roughly 40% less than comparable fiberglass units. That weight advantage makes rolling and unrolling effortless, even when the cover is coated in snow or rain.
Roll-and-Lock Track System
Our proprietary track mounts along both bed rails and houses a continuous hinge mechanism that lets the cover roll smoothly in either direction. When you want full bed access, release the tailgate latch and roll the entire cover forward—it bundles neatly behind the cab without removing any hardware.
The same track locks the cover flat at multiple positions: fully closed, partially open at the first panel, or anywhere in between. Spring-loaded pins engage automatically when you press down on the leading edge, so you never fumble with separate latches or straps.
Weather Sealing and Drainage
The Revolver X4S uses a four-sided seal that compresses against the bed rail when locked. We mold the seal from EPDM rubber that stays flexible down to -40°F and won’t crack in desert heat.
Integrated drainage channels route water away from the cab and toward the tailgate, preventing pooling on top of the cover. The channels exit through small ports at the rear corners, keeping moisture out of the bed even during heavy rain.
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Common Questions About the Revolver X4S
Yes, the standard clamp kit accommodates most spray-in liners up to 3/8 inch thick. We also offer an extended-reach clamp kit for liners thicker than that.
Measure the liner thickness at the bed rail edge before ordering. If your liner has a rolled or molded edge that extends more than half an inch above the rail, contact us to verify fitment.
Yes, you can lock the cover in any position along the track and drive safely at highway speeds. The spring-loaded pins engage automatically when you press down, so the cover won't unroll while driving.
We recommend securing the rolled portion with the included bungee strap if you're driving more than a few miles with it fully open, just to prevent wind flutter.
The Revolver X4S is rated for 300 pounds of evenly distributed weight when locked in the flat position. That covers most rooftop cargo carriers, ladder racks, and kayak mounts.
Concentrated loads—like standing on a single panel—exceed the design limit and can damage the aluminum slats. For regular heavy top-loading, consider our rigid folding covers instead.
Yes, every Revolver X4S includes a rotary latch at the tailgate that locks with two keys. The latch integrates with your truck's existing tailgate handle, so you don't need a separate lock mechanism.
When locked, the cover cannot be rolled open even if someone tries to force it from the cab end.
The X4S uses heavier-duty aluminum slats and thicker 24-ounce vinyl compared to the standard X4. That translates to better impact resistance and a slightly higher load rating.
Both models use the same roll-and-lock track system and install the same way. If you haul tools or equipment regularly, the X4S is worth the upgrade. If you mostly use the cover for weather protection, the standard X4 works fine.
The cover itself rolls forward and bundles behind the cab, giving you full bed access without removing anything. If you need to take the entire rail system off the truck, you'll need a hex key to loosen the clamp bolts.
Removal takes about 10 minutes and reinstallation is just as quick since the clamps stay adjusted to your bed width.
We treat the vinyl with a UV inhibitor that resists fading for the life of the warranty. We've tested samples in Arizona sun for two years with minimal color shift.
If you park outdoors year-round in extreme climates, occasional cleaning with mild soap helps the finish last longer. Avoid petroleum-based cleaners or armor products that can degrade the vinyl.