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Vivid Racing Gear 
QA1 Pro Coil System for 2003-2011 Crown Victoria (MD431-09450)
Upgrade your Crown Victoria's ride quality with the QA1 Pro Coil System, specifically designed for models from 2003 to 2011. This system offers a perfect blend of adjustability and performance, making it an ideal choice for both everyday driving and spirited handling.
Key Features
- Fully Adjustable Ride Height: Tailor your vehicle's stance to your liking with a fully threaded body that allows for precise height adjustments.
- Customizable Valving Control: Fine-tune the shock valving to match your driving style, ensuring a comfortable ride whether you're cruising or cornering.
- Spring Rate Selection: Choose a spring rate that suits your needs, with a 450 lb rating included in this kit for optimal performance.
- Double Adjustable Shocks: The front Pro Coil double adjustable stock mount shock kit provides enhanced control over your vehicle's handling characteristics.
- 9" Spring: Comes with a 9-inch spring featuring a flat end design, ensuring compatibility and ease of installation.
Benefits of the QA1 Pro Coil System
Experience a noticeable improvement in your vehicle's handling and comfort. The ability to adjust both ride height and shock valving means you can achieve the perfect balance for any driving condition. Whether you're looking to lower your ride for a sportier look or adjust it to handle better on winding roads, this coil system has you covered.
Specifications
- Model: MD431-09450
- Compatibility: 2003-2011 Ford Crown Victoria
- Spring Rate: 450 lbs
- Spring Length: 9 inches
- Shock Type: Double adjustable
Fitment
The QA1 Pro Coil System is designed to fit seamlessly into your 2003-2011 Crown Victoria. Installation is straightforward, allowing you to enjoy enhanced performance without extensive modifications.
Customer Insights
Users have praised the QA1 Pro Coil System for its impressive ride quality and handling improvements. Many appreciate the ease of adjustability, noting that it allows for quick changes based on driving conditions or personal preference. The quality of construction and materials also received high marks, ensuring durability and long-lasting performance.
Other Part Numbers:
QA1 #qapMD431-09450
⚠ 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 | $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 |
