QA1 MG401-11250C Pro-Coil MOD Series Double Adjustable Coilover Shock Kit with Remote Canister and 250 lb/in Spring

The QA1 MG401-11250C is a MOD Series Pro-Coil coilover shock kit built for serious performance in drag racing, pro-touring, and high-demand street applications. Featuring a lightweight billet aluminum body, this double-adjustable system gives drivers full independent control over compression and rebound valving, paired with a nitrogen-charged remote canister for installation flexibility in tight engine bays.

At the heart of QA1's MOD Series is QuickTune Technology — dry modular valve packs that allow complete revalving without removing the shock from the vehicle. This means faster setup changes and no risk of oil path interruption or debris contamination. Medium compression and rebound valve packs are included as standard, with soft and firm packs available separately for further tuning.

The fully threaded shock body enables precise ride height adjustment, while the adjustable low-speed bleed provides an expanded force curve for an exceptional range of tunability. The base eyelet is indexable, allowing repositioning at any angle for optimal shock and canister placement. This kit includes an 11-inch large tapered flat spring rated at 250 lb/in, with a compressed height of 8.63 inches and an extended height of 12.63 inches. QA1's American-made high-travel springs feature fewer coils and a smaller wire diameter for increased suspension travel and reduced unsprung weight.

Key Features:

• MOD Series double adjustable — independent compression and rebound adjustment with low-speed bleed
• QuickTune Technology — modular valve packs swappable without removing shock from the vehicle
• Lightweight billet aluminum coilover shock body
• Nitrogen-charged remote canister for tight-clearance installations
• Indexable base eyelet for flexible mounting angles
• Fully threaded body for ride height adjustability
• 11-inch large tapered flat spring, 250 lb/in spring rate included
• Compressed height: 8.63 in. | Extended height: 12.63 in.
• 100% dyno tested and serialized
• Serviceable and rebuildable by QA1 Authorized Service Centers
• Made in the USA — manufactured in Lakeville, Minnesota
• Sold as a kit (pair)

Designed for drag racing, pro-touring, autocross, road racing, and street rod builds, the QA1 MG401-11250C Pro-Coil MOD Series kit delivers competition-grade tunability in a bolt-in coilover package.