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Vivid Racing Gear 
QA1 Heavy Duty Pro Rear System - DS501-12300
If you're looking to upgrade your vehicle's suspension, the QA1 Heavy Duty Pro Rear System is an excellent choice for those wanting to add coilovers to their car or truck. Designed specifically for vehicles with a rear axle weight ranging from 1700 to 2600 lbs, this comprehensive kit comes with everything you need for a straightforward installation.
Key Features
- Robust Construction: The system includes double shear bracketry and increased spring rates, providing the strength and support necessary for both street and race applications.
- Adjustable Ride Height: With axle-mounted brackets that allow for incremental adjustments, you can achieve a total of 9 inches of ride height adjustability. This feature gives you complete control over your vehicle's stance.
- Single-Adjustable Coil-Overs: The QA1 single adjustable Proma Star shocks are designed to offer exceptional ride quality. With a simple turn of a dial, you can switch from a comfortable cruise to a more aggressive feel, making them perfect for both daily driving and spirited backroad adventures.
- Easy Installation: This kit includes all essential brackets, tabs, and hardware, making it a simple weld-on solution that eliminates the need for extensive fabrication or multiple trips to the parts store.
- Lifetime Warranty: Enjoy peace of mind with a best-in-class lifetime warranty. Just register your product at QA1.net/warranty for coverage on your QA1 shocks.
- Made in the USA: Proudly manufactured in Lakeville, Minnesota, ensuring top-notch quality and craftsmanship.
Specifications
- Fitment Notes: Welding is required for installation.
- Axle Tube Compatibility: Designed for 3.00 inch axle tubes.
- Shock Mount Dimensions: Tubular upper shock mounts measure 1-5/8 inch diameter with a .095 wall thickness, and are 40 inches long.
- Included Components: The Pro Rear System comes with two single adjustable coilover shocks, two springs, a 40" long weld-in tube, and all necessary mounting hardware.
- Tools Required: Use of QA1 spanner wrench T114W or T115WHD is necessary for adjustments.
Customer Feedback
Customers appreciate the QA1 Heavy Duty Pro Rear System for its impressive performance and ease of installation. Many have noted how the adjustable ride height allows for customization based on driving style and preferences. The single adjustable shocks have received high praise for their ability to balance comfort and performance, making them suitable for a variety of driving conditions.
Other Part Numbers:
QA1 #qapDS501-12300
⚠ 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 | $764.98 |
| 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 | $648.29 | $847.44 | ? | $764.95 | ? | 2025-07-11 10:45:16 |
