QA1 MG507-10400C Pro-Coil MOD Series Double Adjustable Coilover Kit with Remote Canister and 400 lb 10-Inch Spring

The QA1 MG507-10400C is a Pro-Coil MOD Series double adjustable coilover kit built for high-performance drag racing and pro-touring applications. This aluminum shock features an adjustable low-speed bleed with stock-mount configuration and includes a remote nitrogen-charged canister, giving racers an exceptional degree of tunability without sacrificing installation flexibility.

At the heart of the MOD Series is QA1's QuickTune Technology — a system of dry, modular valve packs that can be swapped out in minutes while the shock remains on the car. This industry-first design allows for complete re-valving 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, with optional soft or firm packs available separately.

Key Features:

• Double adjustable design with independent compression and rebound control via adjustable low-speed bleed
• QuickTune Technology — re-valve in minutes with dry modular valve packs, shock stays on the car
• Remote nitrogen-charged canister for ease of installation in tight spaces
• Indexable base eyelet — unbolt and reattach at the optimal angle for best shock and canister placement
• Mounting adjustability to accommodate a variety of vehicles and configurations
• Compressed height: 9.63 inches; Extended height: 14.5 inches
• Includes 10-inch large tapered flat spring rated at 400 lb/in
• 100% dyno-tested and serialized at QA1's Lakeville, Minnesota facility
• Aluminum construction for reduced weight

Every QA1 MOD Series shock is individually dyno-tested and serialized before leaving the factory, ensuring consistent, repeatable performance straight out of the box. The MG507-10400C delivers the force curve range and precision tuning capability demanded by serious racers and performance builders alike.