SKU: MS431-09650 | UPC: 806990159922
QA1 03-11 Ford Crown Victoria Pro Front Coil-Over System – Single Adj. – 9in x 650lbs/in – Aluminum
QA1 MS431-09650 is a front Pro-Coil single adjustable coilover kit designed for 2003-2011 Ford Crown Victoria models using stock mounts. This system features 9-inch springs rated at 650 lbs/in with flat ends for precise ride height and damping control to match your driving needs. Fully threaded aluminum bodies allow adjustments for stance and weight balance delivering responsive handling on street or track.
Key Features
- Lightweight Billet Aluminum Shocks: Cuts unsprung weight improves suspension response and acceleration
- Single Adjustable Damping: 18-position valving adjustment tunes compression and rebound for any condition
- Ride Height Adjustable: Threaded spring perch and body provide 1.5-3 inches of drop without components
- 9in 650lbs/in Springs: Linear rate supports heavier front ends maintains balance under load
- Dyno Tested Serialized: Each shock validated for consistent performance rebuildable at QA1 centers
Product Notes
- Direct bolt-in no welding or fabrication required uses factory upper and lower mounts
- Serviceable design permits rebuilds for long-term durability
- Kit ships fully assembled ready for installation
Installation Notes
- Professional installation recommended.
- Reuse factory hardware torque to OEM specs
- Compatible with stock sway bar and control arms
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2003-2005 | Ford | Crown Victoria | S |
| 2005 | Ford | Crown Victoria | Special Edition |
| 2003-2008 | Ford | Crown Victoria | Base |
| 2010-2011 | Ford | Crown Victoria | Base |
| 2006-2009 | Ford | Crown Victoria | Fleet |
| 2003-2009 | Ford | Crown Victoria | LWB |
| 2003-2011 | Ford | Crown Victoria | LX |
| 2004-2006 | Ford | Crown Victoria | LX Sport |
| 2003-2011 | Mercury | Grand Marquis | All |
| 2003-2011 | Lincoln | Town Car | All |
Why Choose QA1?
- Over 30 years leading motorsports suspension since 1993
- All products manufactured in USA Lakeville MN facility
- Proven in circle track drag racing street performance
Frequently Asked Questions
- Q: Will this fit 2003-2011 Mercury Grand Marquis or Lincoln Town Car?
A: Yes fits all submodels of 2003-2011 Grand Marquis and Town Car sharing Panther platform stock mounts - Q: What material is used for the shock body?
A: Billet 6061-T6 aluminum body with steel internals for strength and light weight - Q: What is the warranty and service option?
A: QA1 offers limited lifetime warranty on shocks rebuild service available at authorized centers
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Securely boxed coilover kit
- Weight: 28 lbs
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