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Vivid Racing Gear 
QA1 Heavy Duty Pro Rear System - DD501-12300
Are you ready to take your vehicle's suspension to the next level? The QA1 Heavy Duty Pro Rear System is designed to seamlessly integrate coilovers into your car or truck, providing the strength and adjustability you need for both street and race applications. With a focus on performance and durability, this system is the ideal choice for vehicles with a rear axle weight between 1700 to 2600 lbs.
Key Features
- Complete Kit: Comes with all necessary hardware and bracketry for a straightforward installation.
- Double Shear Bracketry: Ensures maximum strength and support, perfect for demanding driving conditions.
- Ride Height Adjustability: Enjoy 9 increments of ride height adjustment, allowing you to customize your vehicle's stance to your liking.
- Double-Adjustable Coil-Overs: Features Proma Star shocks with independent rebound and compression tunability, delivering exceptional handling and control.
- Easy Weld-In Installation: The kit includes essential brackets, tabs, and hardware, making it easy to install without unnecessary trips to the parts store.
- Best In-Class Lifetime Warranty: Register for lifetime coverage of your QA1 shocks at QA1.net/warranty.
- Made in the USA: Proudly manufactured in Lakeville, Minnesota.
Specifications
- Fitment: Designed for 3.00" axle tubes.
- Upper Shock Mount Dimensions: 1-5/8" diameter x .095" wall, 40" long.
- Required Tools: Use QA1 spanner wrench T114W or T115WHD for adjustments.
- Included Components: Two double adjustable coilover shocks, two springs, a 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 process and the noticeable improvement in handling. Many have highlighted the precise adjustability of the coilovers, stating that it allows them to achieve their perfect ride height effortlessly. The quality of the components and the robust construction have also received positive feedback, with customers feeling confident in the durability of the system during both daily driving and track use.
Other Part Numbers:
QA1 #qapDD501-12300
⚠ 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 | $968.98 |
| Shipping |
Weight: 36.80 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 |
