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Vivid Racing Gear 
QA1 Pro Coil System MD431-09650 for Crown Victoria (2003-2011)
Upgrade your driving experience with the QA1 Pro Coil System specifically designed for 2003-2011 Crown Victorias. This system offers fully adjustable ride height and valving control, allowing you to tailor your suspension to match your unique driving style.
Key Features
- Customizable Spring Rate: Choose the spring rate that best fits your driving needs, ensuring optimal performance on the road.
- Adjustable Valving: Fine-tune the shock valving to match your driving conditions, enhancing comfort and control.
- Fully Threaded Body: The shocks feature a fully threaded body, enabling precise ride height adjustments for that perfect stance.
- Improved Handling: Adjust the weight balance for superior handling, making your driving experience more enjoyable.
Specifications
- Model: MD431-09650
- Application: Front Pro Coil double adjustable stock mount shock kit
- Spring Length: 9 inches
- Spring Rate: 650 lbs
- Spring End Type: Flat end
Benefits of the QA1 Pro Coil System
This coil system not only enhances the aesthetics of your vehicle but also significantly improves handling and ride quality. Whether you're navigating city streets or taking on winding roads, this system adapts to your preferences, providing a smooth and controlled ride.
Customer Reviews
"The QA1 Pro Coil System completely changed my Crown Victoria's ride. The adjustable features let me find the perfect setup for my driving style, and the handling is noticeably better!"
"Installation was straightforward, and I love how I can tweak the ride height whenever I want. It’s made a big difference in how my car feels on the road."
Fitment
This Pro Coil System is specifically engineered for 2003-2011 Crown Victorias, ensuring a perfect fit and optimal performance tailored to your vehicle.
Other Part Numbers:
QA1 #qapMD431-09650
⚠ 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 | $1,055.99 |
| Shipping |
Weight: 21.70 Length: 21 Width: 9 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 | $894.91 | $1,169.82 | ? | $1,055.95 | ? | 2025-07-11 10:45:14 |
