QA1 MG401-10650C Pro-Coil MOD Series Double Adjustable Coilover Kit with Remote Canister, 10in. 650 lb/in Spring

The QA1 MG401-10650C is a Pro-Coil MOD Series double adjustable coilover kit featuring a nitrogen-charged remote canister and a 10-inch, 650 lb./in. large tapered flat spring. Designed for high-performance drag race and pro-touring applications, this kit delivers an exceptional range of tunability straight from the factory.

At the heart of this system is QA1's QuickTune Technology — dry modular valve packs that can be swapped out in minutes while the shock remains on the vehicle, without interrupting the oil path or exposing internals to contamination. This allows you to completely re-valve the shock on the fly as track conditions or driving style demand.

Key Features:

• Double adjustable with low-speed bleed — fully independent control over compression and rebound characteristics
• Remote nitrogen-charged canister with indexable base eyelet for flexible installation in tight spaces
• 10-inch large tapered flat (Big Flat) spring rated at 650 lb./in.
• Compressed height: 8.63 inches | Extended height: 12.63 inches
• Mounting adjustability to accommodate a variety of vehicles and configurations
• Medium compression and rebound valve packs included standard; soft or firm packs available separately
• Includes Torrington bearings
• 100% dyno tested and serialized
• Made in the USA at QA1's Lakeville, Minnesota facility

Whether you're drag racing, autocrossing, road racing, or building a pro-touring street machine, the QA1 MOD Series Pro-Coil kit provides an unprecedented level of suspension tunability in a bolt-in package.