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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 45 Items.
Suspension Lift, Leaf Spring Block, Cast Iron, Rear, 2.0 in., Chevy, GMC, Kit
Part Number: RLS-66-3112
Estimated Ship Date: Today
Estimated Ship Date: Today
This product may not be eligible for select promotional offers
Suspension Lift, Leaf Spring Block, Cast Iron, Rear, 2.5 in., Ford, Kit
Part Number: RLS-26-21250
Not Yet Reviewed
Estimated Ship Date: Feb 19, 2026 if ordered today
Estimated Ship Date: Feb 19, 2026 if ordered today
This product may not be eligible for select promotional offers
Lift Block, Rear, 1.0 in. Lift, Toyota, Kit
Part Number: RLS-66-5001
Estimated Ship Date: Feb 18, 2026 if ordered today
Estimated Ship Date: Feb 18, 2026 if ordered today
This product may not be eligible for select promotional offers
Need It Sooner? We recommend these similar substitute parts:
Eibach Pro-Truck Rear Lift Block Kits for 2005-2023 TACOMA, 2005-2020 TUNDRA - LB81-82-007-01-02
Not Yet Reviewed
Estimated Ship Date: Today
Suspension Blocks and U-Bolts, Cast Iron 1.0 in. Thick Blocks, Dodge, Ram, Rear, Kit
Part Number: RLS-66-1201
Not Yet Reviewed
Estimated Ship Date: Feb 23, 2026 if ordered today
Estimated Ship Date: Feb 23, 2026 if ordered today
This product may not be eligible for select promotional offers
Suspension Lift, Leaf Spring Block, Cast Iron, Rear, 4.0 in., Ford, Kit
Part Number: RLS-66-2024
Not Yet Reviewed
Estimated Ship Date: Feb 18, 2026 if ordered today
Estimated Ship Date: Feb 18, 2026 if ordered today
This product may not be eligible for select promotional offers
Suspension Lift, Leaf Spring Block, Cast Iron, Rear, 1.0 in., Chevy, GMC, Kit
Part Number: RLS-26-30100
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
This product may not be eligible for select promotional offers
Suspension Blocks and U-Bolts, Cast Iron, 4.00 in. Thick, Ford, Rear, Pair
Part Number: RLS-66-2014
Estimated Ship Date: Feb 18, 2026 if ordered today
Estimated Ship Date: Feb 18, 2026 if ordered today
This product may not be eligible for select promotional offers
Leaf Spring Blocks, 2.25 in. Block, Cast Iron, Chevy, GMC, Kit
Part Number: RLS-66-3002
Estimated Ship Date: Today
Estimated Ship Date: Today
This product may not be eligible for select promotional offers
Suspension Blocks and U-Bolts, Cast Iron 2.0 in. Thick Blocks, Dodge, Ram, Rear, Kit
Part Number: RLS-66-1202
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
This product may not be eligible for select promotional offers
Suspension Lift, Leaf Spring Block, Cast Iron, Rear, 6.0 in., Chevy, GMC, Kit
Part Number: RLS-26-3460
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
This product may not be eligible for select promotional offers
Leaf Spring Blocks, 3.0 in. Block, Cast Iron, Chevy, GMC, Kit
Part Number: RLS-66-3003
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
This product may not be eligible for select promotional offers
Lift Block, Rear, 2.0 in. Lift, 4.0 in. Block, Ford, Pickup, Kit
Part Number: RLS-66-2094
Estimated Ship Date: Today
Estimated Ship Date: Today
This product may not be eligible for select promotional offers
Suspension Block and U-Bolt Kit; 1.5 in. Block Kit; OEM Style Model Specific Rear Blocks; Includes Solid Cast
Part Number: RLS-66-2051
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
This product may not be eligible for select promotional offers
Suspension Blocks, Rear Block Kits, 3.00 in., Includes Blocks, Bump Stop Extensions, U-Bolts, Hardware, Ram, Kit
Part Number: RLS-26-19300
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
This product may not be eligible for select promotional offers
Lift Block, Rear, 4.0 in. Lift Block, Ford, Kit
Part Number: RLS-26-21400
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
This product may not be eligible for select promotional offers
Suspension Blocks, Rear Block Kit, 4.00 in. Thick, Cast Iron, U-Bolts Included, Ford, F-250/F-350, Super Duty, Kit
Part Number: RLS-66-2294
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
This product may not be eligible for select promotional offers
Suspension Lift, Leaf Spring Block, Cast Iron, Rear, 5.0 in., Chevy, GMC, Kit
Part Number: RLS-26-3105
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
This product may not be eligible for select promotional offers
Lift Block, Rear, 2.0 in. Lift, Toyota, Kit
Part Number: RLS-66-5002
Estimated Ship Date: Today
Estimated Ship Date: Today
This product may not be eligible for select promotional offers
Suspension Lift, Leaf Spring Block, Cast Iron, Rear, 5.0 in., Ford, Kit
Part Number: RLS-26-2752
Not Yet Reviewed
Estimated Ship Date: Feb 18, 2026 if ordered today
Estimated Ship Date: Feb 18, 2026 if ordered today
This product may not be eligible for select promotional offers
Suspension Lift, Leaf Spring Block, Cast Iron, Rear, 4.0 in., Chevy, GMC, Kit
Part Number: RLS-26-3204
Not Yet Reviewed
Estimated Ship Date: Feb 18, 2026 if ordered today
Estimated Ship Date: Feb 18, 2026 if ordered today
This product may not be eligible for select promotional offers
Suspension Blocks, Rear Block Kits, 4.00 in., Includes Blocks, Bump Stop Extensions, U-Bolts, Hardware, Ford, Kit
Part Number: RLS-26-2104
Not Yet Reviewed
Estimated Ship Date: Feb 19, 2026 if ordered today
Estimated Ship Date: Feb 19, 2026 if ordered today
This product may not be eligible for select promotional offers
Suspension Lift, Leaf Spring Block, Cast Iron, Rear, 4.0 in., Chevy, GMC, Kit
Part Number: RLS-26-3104
Not Yet Reviewed
Estimated Ship Date: Feb 19, 2026 if ordered today
Estimated Ship Date: Feb 19, 2026 if ordered today
This product may not be eligible for select promotional offers
Suspension Lift, Leaf Spring Block, Cast Iron, Rear, 5.0 in., Chevy, GMC, Kit
Part Number: RLS-26-3205
Not Yet Reviewed
Estimated Ship Date: Feb 19, 2026 if ordered today
Estimated Ship Date: Feb 19, 2026 if ordered today
This product may not be eligible for select promotional offers
Suspension Lift, Leaf Spring Block, Cast Iron, Rear, 5.0 in., Ford, Kit
Part Number: RLS-66-2295
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
This product may not be eligible for select promotional offers
Suspension Kit, Blocks, Rear, 1.00 in. Lift, for Nissan, Titan, Kit
Part Number: RLS-66-4001
Not Yet Reviewed
Estimated Ship Date: Feb 20, 2026 if ordered today
Estimated Ship Date: Feb 20, 2026 if ordered today
This product may not be eligible for select promotional offers
