See all Suspension products
Product thumb
QA1 DS501-12250 HD Pro Rear Coilover Conversion System, 3.0" Axle, Single, 250lb
$764.95

QA1 Heavy Duty Pro Rear System - DS501-12250

Product Overview

If you're looking to enhance your vehicle's rear suspension, the QA1 Heavy Duty Pro Rear System (DS501-12250) is a fantastic choice. This kit is tailored for vehicles with a rear axle weight ranging from 1700 to 2600 lbs, making it suitable for a wide variety of cars and trucks. It comes with all the necessary hardware and bracketry for a hassle-free installation, ensuring you can get back on the road quickly and efficiently.

Key Features

Robust Design

Constructed with double shear bracketry and increased spring rates, this system provides the strength and support needed for both street driving and racing applications. The kit features axle mount bracketry, upper shock mounts, and tubing, along with fully adjustable QA1 coilover shocks and springs.

Ride Height Adjustability

One of the standout features of the DS501-12250 is its ride height adjustability. The axle-mounted brackets allow for incremental adjustments, while the coilover shocks enable fine-tuning. With a total of 9 inches of ride height adjustability, you can easily achieve your desired stance, whether you prefer a sleek look or a more aggressive setup.

Single-Adjustable Coil-Overs

The kit includes QA1's single adjustable Proma Star shocks that excel in delivering a smooth ride and outstanding performance. Adjusting the ride quality is as simple as turning a dial, allowing you to switch from a comfortable cruise to a sportier feel in seconds. This versatility makes it perfect for daily driving or tackling twisty backroads.

Easy Weld-In Installation

Installation is straightforward with the included brackets, tabs, and hardware, allowing for a simple weld-on solution that minimizes fabrication time and trips to the parts store. You’ll appreciate the efficiency of getting your vehicle outfitted with this system.

Best In-Class Lifetime Warranty

QA1 stands behind their products with a best-in-class lifetime warranty. Just register at QA1.net/warranty for lifetime coverage on your QA1 shocks, giving you peace of mind with your purchase.

Made in the USA

This Heavy Duty Pro Rear System is proudly manufactured in Lakeville, Minnesota, ensuring high-quality craftsmanship and materials.

Specifications

  • Welding required for installation
  • Designed for 3.00 axle tubes
  • Included tubular upper shock mount dimensions: 1-5/8?? diameter x .095?? wall, 40?? long
  • Requires use of QA1 spanner wrench T114W or T115WHD
  • Includes two single adjustable coilover shocks, two springs, 40" long weld-in tube, and all necessary mounting hardware

Fitment Notes

This system is designed to fit a wide range of vehicles, but please ensure compatibility with your specific model before purchasing.

Customer Insights

Users have praised the QA1 Heavy Duty Pro Rear System for its excellent adjustability and ride quality. Many have noted that the installation process is straightforward and that the system dramatically improves handling and stability, making it a worthwhile upgrade for both street and track enthusiasts.

Other Part Numbers:
QA1 #qapDS501-12250

Proposition 65

WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

QA1 Banner

Who is QA1?

QA1 is a company that was founded in 1993. They specialize in manufacturing high-quality suspension parts, shock absorbers, composite driveshafts, bearings, steering components, and other related accessories. Their products are used in different industries such as the industrial, motorsports, and automotive sectors. Today, they are the leading manufacturer of OE parts in the market.

Suspension Experts

The company is best known for its motion control sub-assemblies and wide range of suspension systems. They are always searching for new ways to develop each component to enhance their products further. 

State-of-the-Art Facility

The company is housed in one of the most sophisticated facilities in the market to accommodate the increasing demands of its customers. With 100,000 square feet at their disposal, their facility contains high-tech equipment such as a CNC machine, laser cutting equipment, hydraulic presses, and filament windings. It allows them to manufacture the best product in the market.

QA1 is also one of the few companies that are ISO certified. It guarantees that their parts are manufactured consistently, following the standards put in place by the company and the regulators.

Purchase QA1 Products At Vivid Racing

If you are in the market for quality suspension parts for your vehicle, then QA1 is the brand for you. They have been manufacturing components for the last 28 years and have consistently given their customers parts that meet their demand. To know more about QA1, visit Vivid Racing and check out their list of parts that meet your demand.



You're seeing this because you're logged into an employee account or you're accessing the site through an internal IP address. This information is not normally visible.
Things
Sale price None
Wholesale price $764.98
Shipping Weight: 35.50
Length: 40
Width: 8
Height: 8
Product Added At Monday 23 December, 2024
Product Modified At Friday 11 July, 2025
Imported By ETLOverride
Last Edited By Turn_API
View In Admin

Emissions Info
Carb Approved -
Carb Number -
Epa Status N/A
Prop65 Yes
Carb Required -
Vendors
Some placeholder content for the collapse component. This panel is hidden by default but revealed when the user activates the relevant trigger.
Vendor Inv Cost Retail Jobber MAP Core Updated
Turn 14 $648.29 $847.44 ? $764.95 ? 2025-07-11 10:45:16


Check out these other great products