Speedway Motors Rear Axle/Leaf Spring Mounting Bracket Kit
- The leaf spring pads are weld-on and will work with all 2-1/2" wide leaf springs
- Mounting plate accepts 2.5" leaf spring and has a single shock boss
- U-bolts are designed to work with 3" diameter axle tubes
- Center to center of threaded end width of the U-bolts is 3.685" with the inside to inside working width of 3.185"
- Lightweight aluminum lowering blocks are engineered to be stronger than billet
Build Your KitYou're almost there! This kit has an option or two for you to select. Let us know which options you want for your new kit.
Creating a custom build means making custom components work together to meet your specific requirements or desires. When it comes to mounting up your rear axle/leaf spring combination, Speedway Motors has you covered with these complete bracket/block/hardware kits.
- (1) Pair of Weld-On Leaf Spring Pads for 3" Axle
- (1) Pair of Leaf Spring Lower Shock Mount Plates, Left and Right
- (4) 10" Leaf Spring U-Bolts for 3" Axle
- (2) Aluminum Leaf Spring Lowering Blocks (Your Choice Height)
Leaf Spring Pads
These weld-on leaf spring pads fit 3" diameter axle tubes. Works with all 2-1/2" wide leaf springs.
Leaf Spring Shock Mount Plates
Steel leaf spring lower shock mounting plate. Left and Right side. Eases the mounting of rear shocks.
- Accepts 2.5" leaf spring
- Bolt holes are 3-5/8" apart center to center
- Bolt holes are 3-1/8" center to center on flange sides
- Bolt holes are 9/16" I.D.
- Single shock boss
Leaf Spring U-Bolts
Speedway leaf sping axle U-bolts are a great replacement for worn out stock bolts and feature a generous length to accomodate lowering blocks (sold separately) to fine tune your ride height. U-bolts are made from heat-treated and zinc-plated steel to ensure long life and durability. All bolts are 1/2" diameter with 1/2"-20 threads. Fits rearend housings with 3" diameter axle tubes.
- Works with 3" diameter axle tubes
- 10" overall length
- 6" thread length
- 1/2"-20 thread pitch
- Includes nylock nuts
- Center to center of threaded end width is 3.685" with the inside to inside working width of 3.185"
Leaf Spring Lowering Blocks
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.
- 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
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
- Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
What's In The Kit
Speedway Weld-On Spring Pad for 3 Inch Axle TubePart # 54585090Qty x 1
Speedway Leaf Spring Lower Right Shock Mounting Plate, 2.5 Inch SpringPart # 91720249-RQty x 1
Speedway Leaf Spring Lower Left Shock Mounting Plate, 2.5 Inch SpringPart # 91720249-LQty x 1
Leaf Spring U-Bolt for 3 Inch Axle Tube, 10 Inch LongPart # 91043800Qty x 4
Speedway Aluminum Extruded Leaf Spring Lowering BlockPart # 91643Qty x 2
Q & A
Tim talks about what options we have for hot rod shocks.
Our hot rod expert takes you through his ford I beam axle setup. Follow as he sets up the front end on his split wishbone front suspension Model A.
When it comes to a traditional style build on an early hot rod it just has to be rolling on a solid front axle of some sort. In this buyer's guide we take you through I-beam and round tube solid axles, spindle choices, radius rod needs, and more.
Learn how to mount a traditional transverse rear leaf spring. These tips will help the installation run smoothly and successfully.
Learn how to lower a hot rod by modifying the axles and some history behind early hop ups. This project features a Ford axle with wishbones for a Model A.
Speedway Street Tech Kevin goes over the install of the TCI 1949-54 Chevy Car Rear Leaf Spring Kit on his '54 BelAir sedan.
Follow this guide on how to install a splined sway bar for GM A-body applications. See the installation process on a '68 Chevelle frame using stock control arms and factory chassis bolt and pad locations.