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Vivid Racing Gear 
QA1 Pro Coil System for 2003-2011 Crown Victoria (MS431-09450)
Key Features
- Fully Adjustable Ride Height: Tailor your vehicle's stance with ease thanks to the fully threaded body design.
- Customizable Spring Rate: Choose a spring rate that aligns perfectly with your driving style for an optimal experience.
- Valving Control: Fine-tune the shock valving to achieve the ideal balance between comfort and performance.
- Complete Kit: Includes a single adjustable stock mount shock kit with a robust 9" spring rated at 450 lbs, featuring a flat end for enhanced performance.
Benefits of the QA1 Pro Coil System
Experience a ride that’s tailored to your preferences. The QA1 Pro Coil System allows for precise adjustments, ensuring that you can achieve the perfect balance between comfort and handling. Whether you're navigating city streets or tackling winding roads, this system provides the flexibility you need for a superior driving experience.
Specifications
- Model: MS431-09450
- Compatibility: Designed specifically for 2003-2011 Crown Victorias
- Spring Length: 9 inches
- Spring Rate: 450 lbs
- Shock Type: Single adjustable
Fitment
The QA1 Pro Coil System is engineered to fit seamlessly into your 2003-2011 Crown Victoria, making installation straightforward and hassle-free. Enjoy the benefits of an adjustable suspension that enhances both the aesthetics and performance of your vehicle.
Customer Insights
Users have praised the QA1 Pro Coil System for its impressive adjustability and ease of installation. Many have noted the significant improvement in handling and ride quality, particularly during spirited driving. The ability to customize the ride height has also been a highlight, allowing for a more personalized driving experience.
Other Part Numbers:
QA1 #qapMS431-09450
⚠ 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 | $842.99 |
| Shipping |
Weight: 20.20 Length: 21 Width: 11 Height: 9 |
| 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 | $714.40 | $933.85 | ? | $842.95 | ? | 2025-07-11 10:45:14 |
