QA1 MG401-10400B Pro-Coil MOD Series Double Adjustable Front Coilover Shock Kit with Remote Canister 400 lb/in Spring

The QA1 MG401-10400B Pro-Coil MOD Series Front Coilover Kit is a professional-grade, double adjustable coilover system engineered for high performance drag racing, pro-touring, and street performance applications. Featuring QA1's multi-patent-pending MOD Series shock technology, this kit delivers an unprecedented level of tunability to keep up with changing track conditions and driving configurations.

QuickTune Technology — Re-Valve in Minutes:

At the core of the MOD Series is QuickTune Technology — a dry modular valve pack system that allows complete re-valving without removing the shock from the car. As an industry first, the MOD Series shock can be revalved without interrupting the oil path or exposing the internals to debris or air contamination. Medium compression and rebound valve packs are included as standard; soft or firm packs are also available separately.

Double Adjustable with Independent Low-Speed Bleed Control:

Once the desired valve packs are installed, the unique double adjustable design with adjustable low-speed bleed provides fully independent control over compression and rebound damping characteristics — delivering an expansive force curve range and maximum fine-tuning capability.

Key Features:

• MOD Series double adjustable shock with adjustable low-speed bleed
• Remote canister nitrogen-charged design with indexable base eyelet for flexible mounting angles
• Compressed height: 8.63 inches | Extended height: 12.63 inches
• Includes 10-inch tapered flat spring rated at 400 lb/in
• Lightweight billet aluminum coilover body construction
• Fully threaded body for precise ride height adjustment
• High-travel spring design with smaller wire diameter and fewer coils for increased suspension travel and reduced unsprung weight
• Stock mount configuration for easy, bolt-in installation
• 100% dyno tested and serialized
• Serviceable and rebuildable by QA1 Authorized Service Centers
• Proudly made in the USA at QA1's Lakeville, Minnesota facility

Sold as a kit. The 400 lb/in spring rate is ideally suited for front axle weights between 1,801–1,900 lbs. QA1's Pro-Coil high-travel springs feature a smaller wire diameter and fewer coils than conventional springs of the same rate and length, resulting in more usable stroke, better ride height adjustability, and faster suspension response.