Complete Lowering Solution – Includes everything needed to achieve a 4-inch rear suspension drop on vehicles with the axle mounted above the leaf springs, Durable Aluminum Blocks – Extruded aluminum blocks measure 2-1/2 inches wide by 5 inches long for reliable strength and fitment, Premium U-Bolt Set – U-bolts sized for 3-inch axle housings and measure 10 inches long to accommodate a wide range of applications, Protective Finish Hardware – U-bolts feature a zinc-plated finish to help guard against wear and maintain a clean appearance over time, Universal Fitment for Custom Builds – Excellent for hot rods, classic cars, and custom projects where a lower stance and improved profile are desired
Speedway Universal Leaf Spring Lowering Block Kit, 4 Inch Speedway Motors
Speedway Universal Leaf Spring Lowering Block Kit, 4 Inch
Sku # 91043811
Mfr. Part # 91043811
Condition
New
Brand
Speedway Motors
Sold
Each
Details

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. 

Specs
MFG. Part #
91043811
Thread Length
6.00"
Sold in Quantity
Kit
Overall Length
5.00"
Overall Width
2.50"
Overall Height
4.00"
Material Type
Aluminum
Tube O.D.
3.00"
Reviews

Yes I would buy it again.

Rated
Product Rating
by Shaun on December 10, 2025

Summary: Great product. Good fit.

Great product and yes I would buy it again.

Rated
Product Rating
by Shaun on December 10, 2025

Summary: Perfect fit for my project.

Used on our 57 Chevy project

Rated
Product Rating
by Rat Rod Relics on February 12, 2025

Summary: Worked out great

Yes, I recommend this product.

I would purchase from this manufacturer again nice quality.

Rated
Product Rating
by Jersey Mike on April 24, 2024

Summary: I used it to lower my car worked great nice quality.

Yes, I recommend this product.

I would recommend, nice quality

Rated
Product Rating
by Boone on February 10, 2024

Summary: Worked great lowering the rear of my 1952 Ford Customline.

Yes, I recommend this product.

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Tech Support
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About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 74 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.