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Vivid Racing Gear 
QA1 Heavy Duty Pro Rear System (DD501-12250)
Upgrade your vehicle's suspension with the QA1 Heavy Duty Pro Rear System, specifically designed for cars and trucks with a rear axle weight of 1700-2600 lbs. This comprehensive kit includes everything you need for a smooth installation, ensuring your ride is both powerful and responsive.
Key Features
- Robust Design: The kit features double shear bracketry and enhanced spring rates, providing the strength and support necessary for both street and racing applications.
- Weld-On Simplicity: This straightforward weld-on kit includes axle mount bracketry, upper shock mounts, and tubing, making installation a breeze.
- Adjustable Ride Height: Enjoy a total of 9 increments of ride height adjustability thanks to the axle-mounted brackets and fine-tuning capabilities of the coilover shocks. Tailor your vehicle's stance to your liking!
- Double-Adjustable Coil-Overs: Experience precision handling with the Proma Star shocks, which offer independent rebound and compression tunability. Perfect for performance enthusiasts who want total control on both the street and the track.
- Lifetime Warranty: Register your purchase at QA1.net/warranty to enjoy a best-in-class lifetime warranty on your QA1 shocks.
- Made in the USA: Proudly manufactured in Lakeville, Minnesota, ensuring top-notch quality and craftsmanship.
Specifications
- Fitment: Designed for 3.00-inch axle tubes.
- Upper Shock Mount Dimensions: 1-5/8 inch diameter x .095 wall, 40 inches long.
- Included Components: Two double adjustable coilover shocks, two springs, 40" long weld-in tube, and all necessary mounting hardware.
- Tools Required: Use QA1 spanner wrench T114W or T115WHD for adjustments.
Customer Insights
Users appreciate the straightforward installation process, highlighting how the included hardware simplifies the setup. Many have noted the noticeable improvement in ride quality and handling, especially during spirited drives. The adjustable features have received praise for allowing drivers to find their perfect suspension settings, whether for daily driving or track days.
Final Thoughts
The QA1 Heavy Duty Pro Rear System (DD501-12250) is an exceptional choice for those looking to enhance their vehicle's performance with high-quality, adjustable suspension components. With its durable construction and lifetime warranty, you can trust this system to deliver both reliability and performance.
Other Part Numbers:
QA1 #qapDD501-12250
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
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 ExpertsThe 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 FacilityThe 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 RacingIf 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.
| Sale price | None |
| Wholesale price | $968.98 |
| Shipping |
Weight: 36.00 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 |
| Carb Approved | - |
|---|---|
| Carb Number | - |
| Epa Status | N/A |
| Prop65 | Yes |
| Carb Required | - |
| Vendor | Inv | Cost | Retail | Jobber | MAP | Core | Updated | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Turn 14 | $821.17 | $1,073.43 | ? | $968.95 | ? | 2025-07-11 10:45:16 |
