Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
Speedway Motors Logo
America's Oldest Speed Shop ®


Speedway Aluminum Extruded Leaf Spring Lowering Blocks

SAME DAY SHIPPING! Most orders ship within 24 hours.

Speedway Aluminum Extruded Leaf Spring Lowering Blocks

Click image to enlarge



Q & A

What's in the Box

Our lightweight extruded aluminum lowering blocks are stronger than billet!  Available in several heights, all 2-1/2" wide, 5" long.  The centering pin is 9/16".  These blocks will increase or decrease suspension height on most leaf spring applications and can be installed below the leaf spring to raise the vehicle or on top of the leaf spring to lower the vehicle. These lowering blocks allow you to lower your leaf spring vehicle by up to 4 inches.  Heavy Duty U-bolts and hardware are available separately.

  • Lightweight aluminum lowering blocks are stronger than billet
  • 2-1/2" wide
  • 5" long
  • 9/16" centering pin
  • Increase or decrease suspension height on most leaf spring applications
  • Allows you to lower your leaf spring vehicle by up to 4 inches
  • U-bolts and hardware available separately

Lowering blocks are sold individually (each).

THICKNESS options explained:

  • 025 = 1/4" thick
  • 050 = 1/2" thick
  • 075 = 3/4" thick
  • 100 = 1" thick
  • 150 = 1.5" thick
  • 200 = 2" thick
  • 250 = 2.5" thick
  • 300 = 3" thick
  • 350 = 3.5" thick
  • 400 = 4" thick

Item Details

Sold individually (each)

You may also be interested in:

Universal Lowering Block Kit, 1 Inch
(Part #91043808)

Kit includes 2 extruded aluminum lowering blocks complete with four 1/2" U-bolts and hardware. Blocks are 2-1/2" wide x 5" long. U-bolts fit 3" diameter axle housings and are 10" long. 

910-43808 Instructions (PDF)

Universal Lower Leaf Spring Plate
(Part #91643510)
                        These universal lower leaf spring plates include mounts for shocks and a sway bar. LH and RH.
Universal Leaf Spring Plate
(Part #91720248)
                        Our universal leaf spring plate features a 1/2" mounting boss on both the front and rear allowing it to work on either side or to run two shocks.

U-bolt holes are 9/16" I.D. Will accept a 3" spring.
Adjustable Lowering Block
(Part #91043320)
                        Adjustable lowering block allow you to adjust the lead in the rear  end. Available in 4 different heights: 1-1/2", 2", 2-1/2" or 3". All sizes are 2-1/2" wide.
Western Chassis 52118 Rear Frame Notching Kit
(Part #91752118)
  • Provides frame clearance for rear axle on lowered cars
  • Gain clearance without sacrificing strength (3/16" thick material)
  • 6-3/4" side to side and 2-7/8" from bottom to top
  • Fits frame rail as wide as 2-1/2"
  • Fit and weld into your frame 
  • Includes a pair of rubber bump stops
Speedway Leaf Spring U-Bolt, 10 Inch Long
(Part #91043800)

Speedway leaf sping axle U-bolts are heat treated and zinc plated to ensure long life and durability. All bolts are 1/2" diameter. Fits 3" diameter axle tubes.

Speedway Weld-On Spring Pad for 3 Inch Axle Tube
(Part #54585090)

These weld-on leaf spring pads fit 3" diameter axle tubes. Works with all 2-1/2" wide leaf springs.

Aluminum Pinion Angle Leaf Spring Shims for 2.5 Springs, 4 Degree
(Part #916433-4)
                        These aluminum leaf spring shims allow you to correct your pinion angle. Availalbe in 2° and 4° angles. Fits 2-1/2" wide springs.