The ProComp 4 Inch Rear Block Kit Ford F250 F350 Super Duty is a purpose-built rear lift solution for 2011 through 2019 Super Duty owners who need a practical and reliable way to restore rear rake for towing and hauling without cutting, welding, or making permanent changes to the factory truck. Built with factory-style construction that includes integrated bump stop landings and locating pins, these tapered rear lift blocks are designed to work with trucks equipped with rear leaf springs, factory rear blocks, and a one-piece driveshaft. At IMM Hawaii Parts, we carry this kit for Ford Super Duty owners who want a properly engineered rear block solution that fits and performs the way a factory component should.
ProComp 4 Inch Rear Block Kit Ford F250 F350 Super Duty Factory Style Construction With Integrated Features
What sets these blocks apart from basic aftermarket alternatives is the factory-style construction that includes integrated bump stop landings and locating pins. The integrated bump stop landings ensure the bump stops contact the axle at the correct point after the blocks are installed, preventing premature contact and protecting the suspension from bottoming out at the wrong point in the travel range. The locating pins keep the blocks precisely positioned between the axle and the leaf spring pack during installation and through regular use, eliminating the shifting and misalignment that can occur with blocks that rely on friction alone to stay in place under load.
Restores Useful Rake for Better Towing and Hauling Performance
Adding 4 inches of rear block height restores the forward rake that disappears when a Super Duty is loaded with heavy cargo, a service body, a flatbed, or a fifth wheel trailer. When the rear of the F250 or F350 compresses under maximum load, the truck sits flat or nose high, which negatively affects towing stability, braking performance, and the overall handling feel under load. The ProComp 4-inch blocks correct this by raising the rear of the Super Duty back into a proper towing stance that keeps the truck level and stable whether you are hauling a full load to a job site or pulling a heavy trailer on the highway.
Heavy Duty U-Bolts and All Required Hardware Included
This kit comes complete with vehicle-specific heavy-duty U-bolts and all required hardware for a full installation without sourcing additional parts. The heavy-duty U-bolts are sized specifically for the F250 and F350 Super Duty rear axle dimensions, providing the clamping force needed to hold the tapered blocks securely in position under the sustained load and vibration that a hard-working Super Duty regularly encounters. Having all required hardware included in the kit means the installation can be completed in a single session without unexpected trips to the hardware store.
Simple Bolt-On Installation for Leaf Spring Setups
This rear block kit installs with a straightforward bolt-on process that requires no cutting of factory components and no permanent modifications to the F250 or F350 structure. The tapered blocks sit between the axle and the factory leaf spring pack and are secured using the included heavy-duty U-bolts at the factory mounting locations. The entire process is clean, straightforward, and reversible, making this kit one of the most practical rear lift options available at IMM Hawaii Parts for Super Duty owners who want to improve their towing stance without committing to a more involved suspension modification.
Important Notes Before Installing
The block height on this kit is 4 inches, but the actual lift gained after installation depends on the size of the factory rear block that is removed and replaced. This kit is designed specifically for F250 and F350 Super Duty trucks equipped with rear leaf springs, factory rear blocks, and a one-piece driveshaft. It is not compatible with two-piece driveshaft configurations. Always confirm your specific Super Duty build before ordering.
Product Details
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Specification
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Details
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Compatible Vehicles
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2011 to 2019 Ford F250 and F350 Super Duty
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Brand
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Pro Comp
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Block Height
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4 inches Tapered
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Construction
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Factory Style with Integrated Bump Stop Landings and Locating Pins
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U-Bolts
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Vehicle Specific Heavy Duty Included
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Hardware
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All Required Hardware Included
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Install Type
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Bolt On, No Cutting Required
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Required Setup
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Rear Leaf Springs, Factory Rear Blocks, One Piece Driveshaft
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Not Compatible
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Two Piece Driveshaft Configurations
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Who This Kit Is For
The ProComp 4 Inch Rear Block Kit Ford F250 F350 Super Duty is the right choice for 2011 through 2019 Super Duty owners with rear leaf spring and one-piece driveshaft setups who want a properly engineered rear block solution for restoring towing rake and improving load-carrying stance. With factory-style construction, integrated bump stop landings and locating pins, heavy-duty U-bolts, and a simple bolt-on install, this kit delivers the rear lift performance that serious Super Duty work trucks need. Shop this kit and more heavy-duty Ford truck upgrades at IMM Hawaii Parts, your trusted source for premium suspension and lift solutions.
Have questions about wheels, tires, or lift kits? Contact IMM Hawaii Parts today for expert guidance and reliable support.
