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Suspension Lift Blocks & Leaf Spring U-Bolts
Whether you’re lifting or lowering your ride, suspension blocks are a great way to add a slick custom look to your leaf spring-equipped vehicle. If you want to add ride...
Whether you’re lifting or lowering your ride, suspension blocks are a great way to add a slick custom look to your leaf spring-equipped vehicle. If you want to add ride height, you can select from a range of suspension block sizes—including 2 inch, 3 inch, and 4 inch lift blocks (and beyond). Or, if you’re going for a pavement-scraping look, check out the range of lowering blocks in 1 inch, 2 inch, or 2.5 inch drops (or lower).
Some suspension blocks are sold individually, but you may want to consider picking up new leaf spring U-bolts too, if the kit doesn’t include them. This ensures that your U-bolts will be sized perfectly...
Whether you’re lifting or lowering your ride, suspension blocks are a great way to add a slick custom look to your leaf spring-equipped vehicle. If you want to add ride height, you can select from a range of suspension block sizes—including 2 inch, 3 inch, and 4 inch lift blocks (and beyond). Or, if you’re going for a pavement-scraping look, check out the range of lowering blocks in 1 inch, 2 inch, or 2.5 inch drops (or lower).
Some suspension blocks are sold individually, but you may want to consider picking up new leaf spring U-bolts too, if the kit doesn’t include them. This ensures that your U-bolts will be sized perfectly for your new suspension blocks, particularly if you’ve opted for a more aggressive suspension lift or drop, say, with something like a 6 inch lift block.
Suspension lift or lowering blocks work by adjusting how the rear axle rides on the leaf springs. For instance, in lowering applications, the suspension block often fits below the axle, but on top of the leaf spring. This pulls the axle up towards the body and chassis, resulting in a lower ride height. Conversely, the orientation is reversed for lift applications, moving the suspension blocks below the leaf springs, where they ride on top of the axle. This raises the chassis by moving the axle lower below the leaf spring.
Suspension lift or lowering blocks can be made from several materials, with aluminum, iron, and steel being the most common. As alluded to above, it’s possible that your stock U-bolts may still accommodate the addition of suspension blocks, but it makes sense to measure and make sure. Replacement leaf spring U-bolts are readily available, and a lot of the suspension block kits on this page include the U-bolts already.
Gearheads like suspension blocks because they’re an easy, straightforward way to raise or lower a leaf spring-equipped vehicle. If that sounds like you, check out all of your suspension block options here. While some suspension blocks are universal, many are application-specific, so you can ensure the proper fitment on the vehicle you’re raising or lowering. Make sense? Start shopping suspension blocks now, at Summit Racing.
Showing In Stock Items. Show All 35 Items.
McGaughy's Lowering Blocks
McGaughy's lowering block kits are an easy and economical way to lower the rear of your vehicle. By creating a mechanical gap between the leaf spring and the rear axle housing you are lowering the ride height of the vehicle. The kits are available for a variety of makes and models, most with your choice of 2 in. and 3 in. drop increments. McGaughy's knows you expect them to offer high-quality products, so they make the blocks out of extruded aluminum, making them stronger than cast aluminum and even steel lowering blocks. U-bolts, lock nuts, and washers are included as well to offer you a complete kit you know you can rely on.
( 6 )
$99.00
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$141.43
Calvert Racing Lowering Blocks
Get the drop on performance with Calvert Racing lowering blocks. These steel blocks are interlocking and stackable onto each other via the centering pin and recess for most applications. One pair provides a 1/2 in. drop and two pairs provide 1 in. drop, and so on.
( 14 )
$35.00
Classic Performance Lowering Block Kits
Classic Performance lowering block kits allow enable you to drop your truck with leaf spring suspension by a full 2 in. The packages include aluminum blocks and new U-bolts, washers, and nuts. Achieve the dynamic stance you want with these easy-to-install components from Classic!
( 21 )
$79.99
On Sale
Scott Drake Rear-End Lowering Kits
There are a few unwritten rules that musclecar owners abide by—showcasing a strong exhaust note, a snazzy paint job, eye-catching wheels … and the perfect stance! For classic Mustang owners, in particular, Scott Drake rear-end lowering kits can help you achieve a level street look with the front-end. These leaf spring suspension blocks enable you to safely drop the backside by a full inch. No more need to heat your springs or remove the leafs! Scott Drake kits include cast aluminum lowering blocks, U-bolts, and nylock nuts. It's an easy adjustment that will make a noticeable difference both in appearance and in corner-handling performance.
( 29 )
$65.85
$59.27
Belltech Rear Block Kits
Belltech rear block kits are made to lower the rear of your vehicle in 1, 2, or 3 in. increments. All kits include aluminum blocks, cold-rolled 1/2 in. diameter U-bolts, washers, and self-locking nuts. When lowering your suspension, these value-packed components are an ideal option for a wide variety of makes and models.
( 83 )
$58.00
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$82.00
UMI Performance Leaf Spring Lowering Blocks
Achieve the perfect stance with UMI Performance leaf spring lowering blocks for 2nd Gen Camaros and Firebirds (1970s and '80s). Lower your car an additional 3/4 in. or 1 in. to fine-tune the ride height. These suspension blocks are machined from 6061 T6 aluminum with a satin black finish. They include a factory compatible locating pin and heavy-duty U-bolts to facilitate installation. The lowering blocks are compatible with UMI 2620 leaf springs, as well as most other leaf springs with standard-style mounting. Sold in pairs.
( 1 )
$59.99
Allstar Performance Lowering Blocks
Easily adjust ride height on leaf spring cars with Allstar Performance aluminum lowering blocks. These blocks are offered in a variety of sizes in both billet and extruded styles.
( 53 )
$14.99
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$55.99
Calvert Racing Multi-Leaf Spacer Kits
Calvert Racing multi-leaf spacer kits serve to fill the void in the factory perch to allow a Calvert split-mono leaf spring to be utilized. These sets are required for those running factory GM multi-leaf perches.
( 6 )
$50.00
Allstar Performance Adjustable Lowering Blocks
You can easily adjust the ride height on your leaf spring suspension with Allstar Performance adjustable lowering blocks. The aluminum blocks are available in a variety of thicknesses.
( 8 )
$44.99
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$54.99
MaxTrac Suspension Lift Blocks
MaxTrac Suspension lift blocks are available for many applications and several heights. These lift blocks are manufactured from fabricated steel and ductile cast iron, so even if you use your truck for heavy loads—or off-road in rough terrain—you can be confident in your lift block choice! Get the desired height you want in your vehicle's suspension with MaxTrac Suspension lift blocks.
( 1 )
$39.86
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$684.64
Eibach Pro-Truck Rear Lift Block Kits
Eibach Pro-Truck rear lift block kits provide a simple and inexpensive way to get the extra lift your truck needs. These kits were developed to provide balanced ride quality and control—redistributing the weight of your truck and help to improve towing performance. The rear lift blocks are CNC-machined from aircraft grade billet aluminum for superior strength and durability. Eibach then completes their lift blocks in a durable black anodized finish for good looks and long-lasting corrosion resistance. Each kit comes with a pair of rear lift blocks, the U-bolts, and required installation hardware. These rear lift block kits are designed to offer a straightforward bolt-on installation, no cutting or drilling required. Features: * Lift blocks have an anodized 6061-T6 billet aluminum construction * Includes extended U-bolts and hardware * Assembled with heavy-duty steel centering pin * Designed for use with Eibach Pro-Truck shocks * Increases ground and wheel clearance
Not Yet Reviewed
$150.00
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$155.00
On Sale
Clearance
Tuff Country Lift Blocks
Tuff Country lift blocks are a simple and economical solution to raising the rear end of many trucks and SUVs. The durable blocks are inserted between the factory axle and leaf spring to lift the rear end. Available as direct-fit or universal blocks, they fit a wide variety of vehicles.
( 15 )
$52.99
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$318.99
$47.69
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$287.09
GSI Machine and Fabrication Drop Block Kits
GSI Machine and Fabrication drop block kits allow you to give your truck that perfect stance. Available in two block thicknesses, they are made from 6061 aluminum and have a hard black anodized finish for durability. They are tagged with a stainless steel GSI logo plate. Choose the kit preferred for your truck.
( 1 )
$134.99
Calvert Racing Mono-Leaf Spacer Kits
Calvert Racing mono-leaf spacer kits are required for those who wish to run a Calvert split-mono and are running GM factory mono-leaf perches. These steel plate pairs will require welding to perch and to center spacer plate to allow split-mono center pin to center locate and lock in place.
( 1 )
$27.99
Pro Comp Lift Blocks
These Pro Comp lift blocks add 1 to 5 1/2 in. of ride height. All of the blocks used are manufactured from top-quality materials and are tapered to improve vehicle driveshaft angle. They are intended for rear vehicle use only.
Not Yet Reviewed
$109.99
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$149.99
Superlift Rear Block Kits
Superlift rear block kits are the perfect way to lift the back-end of your truck or SUV to clear those bigger tires. These suspension lift blocks and U-bolts can raise the rear between 1.5 in. and 5 in., depending on the kit you select. The hardware components are made from top-quality materials, and Superlift kits are available in more than a hundred configurations for fitment on countless makes and models. For economy and value, there's no better way to improve the stance of your ride.
( 138 )
$89.99
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$119.99
Summit Racing™ Rear Lowering Blocks
Give your rig a sleek, low stance. Unlike our universal lowering blocks, these lowering blocks are designed specifically for the Chevy S10, GMC S15, and Dodge Dakota trucks. The blocks are designed to minimize the vibration caused by an out-of-line pinion angle. U-bolts and hardware are included.
Not Yet Reviewed
$10.99
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$22.99
ReadyLift Suspension Rear Block Kits
Are you hauling or towing? Suspension rear block kits from ReadyLift Suspension will give your truck the needed rake to do the job. Based on OEM designs and made from hefty cast iron, these blocks will safely lift the rear of your truck 1 to 3 in., while maintaining that factory ride. So, whether you're hauling a load or just fitting those oversized tires, ReadyLift rear block kits are what you need.
( 15 )
$132.99
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$329.95
Skyjacker Lift Block Kits
These lift block kits from Skyjacker are an affordable way to add some lift to your truck. Constructed from cast iron, these quality-made blocks are specifically designed for your application for the perfect fit and great results.
( 14 )
$80.21
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$155.15
Western Chassis Rear Block Kits
Raise your ride with the dynamic power of Western Chassis rear block kits. These sturdy kits are designed to give your vehicle an extra 1 in. to 4 in. of lift in the back. Your Western Chassis rear block kits come with all of the rear blocks, U-bolts, nuts, and washers that you need to effectively lift the rear-end of your vehicle. The kits are custom-engineered to your vehicle to ensure a perfect fit.
( 8 )
$74.99
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$79.99
AFCO Racing Lowering Blocks
Improve the handling and lower the center of gravity of your Circle Track car with AFCO Racing. These lowering blocks are available in a variety of sizes to suit your application's needs.
( 28 )
$23.99
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$24.99
AFCO Racing Adjustable Lowering Blocks
AFCO Racing adjustable lowering blocks are the way to go for adjusting the handling characteristics of your Circle Track car. These blocks allow front-to-rear adjustment for lead or trail of right rear tire.
( 2 )
$99.99
On Sale
Tuff Country Lift Block and U-Bolt Kits
Tuff Country lift block and U-bolt kits are an economical solution for raising the back of your truck or SUV. Lift blocks are inserted between the factory axle and leaf spring for proper rear-end lift. These kits include the necessary lift blocks and extended, zinc plated U-bolts that are custom fit for each specific application. Order the Tuff Country lift block and U-bolt kit recommended for your vehicle's suspension. Features, items, and specs: * Two lift blocks * Blocks available in tapered or non-tapered design * Available in sizes ranging from 1 in. to 5.5 in. (make sure to check your shock absorber fitment for lifts 2 in. and higher) * Four zinc plated U-bolts and hardware * Maintains a factory ride * Limited lifetime warranty
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$115.99
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$185.99
$104.39
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$167.39
Rough Country Block and U-Bolt Kits
Sagging—an age-old problem that simply happens over the span of your vehicle lift. With Rough Country block and U-bolt kits you can upgrade your rear suspension to remedy the sagging or to just provide a bit of lift. Each kit includes two durable nylon composite or fabricated steel blocks that are powdercoated and tapered to reduce driveline angles, and are much stronger than the standard cast block option. These heavy-duty replacements feature a single 9/16 in. pin to snuggle fit into your factory axle pad, plus a set of round or square e-coated corrosion-resistant steel U-bolts with 4 in. of thread, ensuring that you have plenty of length to securely install the kit to the rear of your vehicle in no time flat. Best of all, Rough Country's vehicle-specific kits are backed by Rough Country's Satisfaction Guarantee! Select a kit designed for your vehicle.
Not Yet Reviewed
$72.00
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$99.95
