2017-2025 Ford F-250 & F-350 Super Duty 4", 5", 6", 7", & 8" Rear Lift Blocks with Integrated Bump Stops – Compound Taper Anti-Wrap Steel
If your vehicle has overload springs, call us for proper U-bolt sizing!
2017–2025 Ford F-250 & F-350 Super Duty Rear Lift Blocks | 4", 5", 6", 7", or 8" | Integrated Bump Stops | Compound Taper Anti-Wrap Steel
Standard lift blocks shift your pinion angle, let your axle wander, and bottom out hard under load. The Apoc Industries Super Duty Rear Lift Blocks with Integrated Bump Stops solve all three — built from 1/4" American steel with our exclusive compound taper technology and factory-matched bump stop integration. The result is true lift height, corrected drivetrain geometry, and real bottoming protection in one fabricated block.
Fits 2017–2025 Ford F-250 and F-350 Super Duty. Engineered and built in East Tennessee, USA 🇺🇸
Why Apoc Bump Stop Blocks?
- Compound Taper Technology: Top taper matches OEM leaf spring angle for secure seating. Bottom taper corrects pinion angle at your lift height — keeping wheels centered and drivetrain stress-free. Learn more →
- Integrated Bump Stops: Built-in bump stop protection prevents harsh bottoming out under load or off-road — a premium feature not found on standard blocks.
- Anti-Wrap Design: Wider reinforced footprint reduces axle wrap, spring twist, and wheel hop under heavy torque or towing loads.
- 1/4" American Steel: Precision robotic welds, zero flex. Stronger than cast blocks by design.
- True Lift Heights: 4", 5", 6", 7", or 8" — measured block height, no inflated numbers.
- Vehicle-Specific Fit: Precision center pin locations for 2017–2025 F-250/F-350 leaf springs. No modifications required.
- USA-Made: Built in East Tennessee by Apoc Industries.
Specs
- Heights: 4", 5", 6", 7", 8" (sold as pair)
- Width: 3" for maximum stability on heavy-duty leaf springs
- Taper: 3-degree compound pinion correction
- Material: 1/4" heavy-duty steel, precision robotic welded
- Finish: Satin black powder coat
- Options: Main U-bolts and anti-wrap U-bolts available at checkout
Installation
- Est. Install Time: ~2.5 hours
- Tools Required: Standard hand tools, floor jack, jack stands, torque wrench
- Always replace U-bolts when increasing block height
- Anti-wrap U-bolts strongly recommended for 5"+ lifts
Note: For 6"–8" builds or high-torque setups, pair with traction bars to fully eliminate wheel hop. Shop Apoc Ladder Traction Bars →
Complete Your Super Duty Build
- 2017–2022 Super Duty 4-Link Conversion Kit — going taller than 8"? The 4-link is your next step
- Super Duty Adjustable Radius Arms — correct front geometry to match your rear lift
- Compound Taper Anti-Wrap Guide — why pinion angle matters and how our blocks fix it
Questions? Call us Monday–Friday, 9–5 EST: 865-983-5004
Built Right. Backed. Right
Our crew’s on call Monday–Friday, 9–5 EST. Hit us up at 865-983-5004 — real support, done right.
First with Compound Tapers. Built to Stay Centered
Built Better, Not Cheaper. Period
Compound Taper Technology
Apoc Anti-Wrap Lift Blocks are the first ever with exclusive compound tapers. The top taper matches your factory OEM leaf spring angle for perfect seating, while the bottom taper maintains proper pinion angle at your chosen lift height.
The Problem with Standard Blocks
Most lift blocks only correct pinion angle and ignore the leaf spring angle. The taller the block, the further back they push your axle — throwing wheels off-center in the fenders and over-extending your driveshaft, which can damage your transfer case.
Benefits of Apoc Anti-Wrap Lift Blocks
Our heavier-duty steel construction with precision robotic welds delivers zero flex and maximum strength. The anti-wrap geometry keeps your axle centered, protects your drivetrain, and provides a stable ride — perfect for serious off-roaders, daily drivers, and tow vehicles.
FAQ'S
Lift Blocks
Here are some of the most common questions we receive about lift blocks, installation, and related components. Our goal is to help you make the best decision for your build with clear, practical information.
A: Yes. Apoc lift blocks are true to size—the height listed is the actual block height, providing that exact amount of rear lift when installed. For example, a 3" block adds 3" of lift over your current leaf spring height.
A: Apoc lift blocks are vehicle-specific and engineered to match your truck’s factory leaf spring setup. The alignment hole and center pin locations are precisely positioned to match OEM specs, ensuring a secure, direct fit with no modifications required.
The main U-bolts are required to secure the axle and block assembly to your leaf springs. You do not have to purchase them from us if your existing U-bolts are long enough. However, if you are changing the size of your lift block, you will need longer U-bolts. Simply measure the difference in height between your current block and the new block — your new U-bolts will need to be that much longer than your current ones.
Anti-wrap U-bolts are optional. They are designed to secure the wider footprint of the block more firmly to the leaf spring, helping to reduce axle wrap, spring twist, and wheel hop. The taller the block, the more beneficial anti-wrap U-bolts become. For block heights over 6 inches, we recommend also installing ladder bars for added stability and to prevent driveline issues.
A: Standard blocks provide basic lift, while anti-wrap blocks feature a wider footprint and additional bracing to reduce axle wrap and wheel hop—especially important for lifted trucks with big tires or high torque output.
A: No, stacking lift blocks is not recommended and can be dangerous. It compromises stability, increases the risk of axle shift, and can cause premature wear or failure of suspension components. Always use a single, properly sized Apoc lift block for safe, reliable performance.
100%
American-Made. No Compromises
Order With Confidence — But Verify Your U-Bolts
Most Apoc Industries vehicle-specific lift block kits already include U-bolts matched to your application. However, trucks with added leaf springs or overload packs are not accounted for in the standard kit. Please verify your current U-bolt lengths before installing — if anything doesn't match, our customer service team can get you the correct U-bolts and eliminate any issues before you're under the truck.
PRE-INSTALL CHECKLIST: CHOOSING THE RIGHT BLOCK HEIGHT
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1Measure fender well gap — front and rear with the truck on level ground, measure the gap between the top of the tire and the fender well at the front axle and again at the rear axle.
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2Calculate the difference more gap in front than rear (e.g. 2" more up front): you need to ADD that difference in the rear — select a block that matches the gap difference. More gap in rear than front (e.g. 2" more in back): you need a block SHORTER than your current one by that difference.
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3Measure your current rear block height, Measure from the bottom of the existing block to the top where it contacts the leaf spring. Take the measurement at the center/middle of the block — not the front or rear edge. Some blocks are tapered, so the front edge may be shorter than the rear edge; the center gives you the true height.
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4Calculate your target block height Current block height ± the fender gap difference = your target lift block height. Use this number to select your Size variant.
U-BOLT SELECTOR GUIDE
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Identify your bend style — There are three bend types: Round bend (nuts sit on top of the leaf spring pack. Inside width typically matches the axle tube diameter.), Square bend (wraps over the top of the leaf spring pack; nuts tighten from below the axle. Inside width on square bends is typically matched to the leaf spring width, not the axle housing.), Semi-round bend (primarily used on Ford Super Duty applications)
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Measure inside width — Measure the inside dimension between the two long legs of your current U-bolt (leg to leg, inside edge to inside edge). This must match your axle housing width.
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Measure U-bolt length — Measure the total length of the long legs on your current U-bolts. When adding a taller block, you'll need longer U-bolts to maintain proper thread engagement through the axle plate and nuts.
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Select your U-bolt option — Use your bend style, inside width, and leg length to select the correct U-bolt variant. If your current U-bolts are borderline on length after adding the new block height, size up.
Learn how to get the most out of your lift with expert install guides and tech tips from Apoc Industries.
Suspension Tech & Guides
Why Apoc’s New Compound Taper Anti-Wrap Lift Blocks Are a Game-Changer (Compared to Standard Blocks)
If you’re lifting your truck — whether for better stance, towing capability, off-roading, or just because it looks badass — the rear suspension is critical. Lift blocks are one of the most popu...