QA1 MG401-10650A Pro-Coil MOD Series Double Adjustable Coilover Kit with Remote Canister, 650 lb/in Spring

The QA1 MG401-10650A Pro-Coil MOD Series is a double adjustable aluminum coilover shock kit engineered for high-performance drag racing, pro-touring, autocross, road racing, and street rod applications. Featuring QA1's multi-patent-pending MOD Series architecture, this kit delivers an exceptional level of tunability and adjustability not found in conventional coilover systems.

At the heart of this system is QuickTune Technology — dry modular valve packs that can be swapped out quickly without removing the shock from the vehicle and without interrupting the oil path or exposing the shock internals to debris or air contamination. Medium compression and rebound valve packs are included as standard; soft and firm packs are available separately for further tuning flexibility.

Once the desired valving is dialed in, the double adjustable design with low-speed bleed adjustment allows for fully independent control over compression and rebound characteristics. This combination of modular re-valving and independent damping adjustment gives the MG401-10650A an expansive force curve capability suited to a wide range of track conditions and driving styles.

The shock features a fully threaded aluminum body for precise ride height adjustment, along with mounting adjustability to accommodate a variety of vehicle configurations. The nitrogen-charged remote canister design makes installation easier in tight spaces, and the indexable base eyelet allows repositioning for optimal shock and canister placement.

Key Specifications:

• Shock Type: MOD Series Double Adjustable, Low-Speed Bleed, Stock Mount
• Body Material: Lightweight Billet Aluminum
• Canister Configuration: Remote Canister
• Compressed Height: 8.63 inches
• Extended Height: 12.63 inches
• Included Spring: 10-inch Tapered Pigtail
• Spring Rate: 650 lb/in

Key Features:

• QuickTune Technology — re-valve in minutes without removing the shock from the car
• Independent compression and rebound adjustment with low-speed bleed control
• Nitrogen-charged remote canister for consistent damping performance
• Fully threaded body for precise, adjustable ride height
• Indexable base eyelet for flexible mounting orientation
• 100% dyno tested and serialized at QA1's Lakeville, Minnesota facility
• Serviceable and rebuildable by QA1 Authorized Service Centers
• Made in the USA

The MG401-10650A is sold as a kit and includes the 10-inch tapered pigtail spring rated at 650 lb/in. It is designed for performance builds where precise suspension tuning is essential, from weekend track days to dedicated race applications.