QA1 MG401-10550B Pro-Coil MOD Series Double Adjustable Coilover Kit 550 lb/in

The QA1 MG401-10550B is a front Pro-Coil aluminum coilover shock kit from QA1's multi-patent-pending MOD Series, designed specifically for high-performance drag race and pro-touring applications. This kit features a stock-mount, double-adjustable shock with remote canister and includes a 10-inch tapered flat coil spring rated at 550 lb/in. The shock body has a compressed height of 8.63 inches and an extended height of 12.63 inches.

At the heart of the MOD Series is QuickTune Technology — dry modular valve packs that can be swapped out in minutes while the shock remains mounted on the vehicle. This industry-first design allows complete revalving without interrupting the oil path or exposing the shock to debris and air contamination. Medium compression and rebound valve packs are included as standard, with optional soft or firm packs available separately.

Key Features:

• MOD Series double adjustable with independent low-speed bleed control for compression and rebound
• QuickTune Technology — revalve in minutes without removing the shock from the car
• Lightweight billet aluminum threaded shock body for ride height adjustability
• Remote nitrogen-charged canister with indexable base eyelet for flexible mounting placement
• Includes 10-inch tapered flat spring, 550 lb/in spring rate
• Compressed height: 8.63 in. | Extended height: 12.63 in.
• Stock mount upper configuration for bolt-in installation
• 100% dyno tested and serialized
• Serviceable and rebuildable by QA1 Authorized Service Centers
• Made in the USA at QA1's Lakeville, Minnesota facility
• Limited Lifetime Warranty (registration required at QA1.net/Warranty)

The MOD Series shock also features mounting adjustability to accommodate a variety of vehicles and configurations. The nitrogen-charged remote canister can be positioned for ease of installation in tight areas, and the indexable base eyelet allows optimal shock and canister placement. A spanner wrench (P/N T114W or T115W) is required for installation; thrust bearing kits (P/N 7888-109) are available separately.