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Vivid Racing Gear 
QA1 Heavy Duty Pro Rear System (DD501-12200)
If you're looking to enhance your ride's performance, the QA1 Heavy Duty Pro Rear System is designed to meet your needs with precision and durability. This kit is ideal for vehicles with a rear axle weight between 1700 to 2600 lbs, making it a versatile choice for both street and race applications.
Key Features
- Complete Installation Kit: This system includes all necessary hardware and bracketry for a straightforward installation process.
- Double Shear Bracketry: Engineered for enhanced strength and support during demanding driving conditions.
- Adjustable Coilover Shocks: Fully adjustable QA1 coilover shocks and springs allow for personalized tuning of your suspension setup.
Ride Height Adjustability
The axle-mounted brackets provide multiple increments of adjustment, while the coilover shocks allow for fine-tuning. With a total of 9 inches of ride height adjustability, you can achieve your desired stance with ease.
Double-Adjustable Coil-Overs
For those who crave precision, the double-adjustable Proma Star shocks offer independent rebound and compression tunability. This feature ensures exceptional handling and control, making them perfect for both street cruising and track racing.
Simple Weld-In Installation
Each kit is designed for easy installation, complete with essential brackets, tabs, and hardware. The weld-on design minimizes the need for extensive fabrication or multiple trips to the parts store, making the process efficient and hassle-free.
Best In-Class Lifetime Warranty
When you choose QA1, you’re covered for life. Register at QA1.net/warranty for lifetime coverage on your QA1 shocks, ensuring peace of mind with your investment.
Made in the USA
Proudly manufactured in Lakeville, Minnesota, the QA1 Heavy Duty Pro Rear System represents quality craftsmanship and reliable performance.
Specifications
- Welding Required: Yes
- Designed For: 3.00 axle tubes
- Upper Shock Mount Dimensions: 1-5/8 diameter x .095 wall, 40 inches long
- Included Components: Two double adjustable coilover shocks, two springs, 40" long weld-in tube, and all mounting hardware
Customer Insights
Users have praised the QA1 Heavy Duty Pro Rear System for its straightforward installation and noticeable improvements in handling. Many have noted that the adjustability options allow for a custom setup that perfectly suits their driving style, whether on the street or the racetrack.
Other Part Numbers:
QA1 #qapDD501-12200
⚠ 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: 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 |
| 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 10:45:15 |
