QA1 MD431-09450 Front Pro-Coil Double Adjustable Coilover Shock Kit 450 lb/in

The QA1 MD431-09450 is a front Pro-Coil double adjustable stock-mount coilover shock kit engineered for drivers who demand full control over both ride height and damping. This kit delivers independent compression and rebound adjustment, allowing you to dial in the exact valving characteristics that match your driving style and track conditions.

The fully threaded shock body provides ride height adjustability so you can fine-tune stance and corner weight balance with precision. Included is a 9-inch spring with a 450 lb/in spring rate and flat end, purpose-built for this application. QA1's high-travel springs feature a smaller wire diameter and fewer coils than conventional springs of the same rate and length, resulting in greater useable travel, reduced unsprung mass, and faster suspension response.

Key Features:

• Double Adjustable Valving — Independent compression and rebound adjustment for precise tuning
• Fully Threaded Body — Ride height adjustable for stance and weight balance optimization
• Includes 9-Inch Spring — 450 lb/in spring rate with flat end
• High-Travel Spring Design — Smaller wire diameter and reduced coil count for more useable stroke and lower unsprung weight
• Stock Mount Design — Direct-fit installation using factory mounting locations
• 100% Dyno Tested and Serialized — Quality-verified before leaving the factory
• Serviceable and Rebuildable — Supported by QA1 Authorized Service Centers
• Made in the USA — Manufactured at QA1's Lakeville, MN facility

QA1 backs this product with a limited warranty against defects in materials and workmanship from the date of original purchase. The MD431-09450 is sold as a pair and is ideal for street performance, road racing, autocross, and circle track applications where tunable suspension is critical.