QA1 MG401-10350B Pro-Coil MOD Series Double Adjustable Coilover Kit with Remote Canister 350 lb/in

The QA1 MG401-10350B is a MOD Series Pro-Coil aluminum coilover kit featuring double-adjustable valving with low-speed bleed control and a remote canister configuration. Built for high-performance drag racing, pro-touring, and street/strip applications, this kit delivers an exceptional range of tunability in a lightweight aluminum shock body.

At the heart of this system is QA1's QuickTune Technology — dry modular valve packs that can be swapped out in minutes without removing the shocks from the vehicle, and without interrupting the oil path or exposing internals to debris or air contamination. Medium compression and rebound valve packs are included as standard, with soft and firm packs available separately for further customization.

Key Features:

• Double-adjustable design with fully independent compression and rebound control via low-speed bleed adjustment — 576 total valving combinations
• QuickTune Technology allows complete revalving in minutes while shocks remain on the vehicle
• Nitrogen-charged remote canister design for ease of installation in tight spaces
• Indexable base eyelet — unbolt and reposition for optimal shock and canister placement
• Fully threaded aluminum shock body for 0–2 inches of ride height adjustment
• Twin-tube internal design; 3.000 in. body diameter, black anodized finish
• Spherical bearing bushings (natural finish)
• Upper and lower eyelet mounts
• Includes 10 in. tapered flat spring (style 10HTSF350) rated at 350 lbs/in.
• Includes Torrington thrust bearings
• Compressed height: 8.63 in. | Extended height: 12.63 in.
• Threaded adjustment range: 3.000 in.
• Gas charged; 100% dyno-tested and serialized
• Sold as a kit; no welding required

The American-made springs are designed specifically for QA1 Pro-Coil systems with fewer coils and smaller wire diameter for increased suspension travel and reduced unsprung weight, allowing the suspension to react faster and optimize handling performance across a wide range of driving conditions.