QA1 MG501-10400A MOD Series Double Adjustable Pro-Coil Aluminum Coilover Shock Kit with Remote Canister, 400 lb/in Spring

The QA1 MG501-10400A is a front Pro-Coil aluminum coilover shock kit built around QA1's multi-patent-pending MOD Series platform, engineered for high-performance drag racing, handling, and pro-touring applications. This kit includes a 10-inch tapered pigtail coil spring rated at 400 lb/in, a double adjustable MOD Series shock body, and a remote nitrogen canister.

QuickTune Technology — Re-Valve Without Removing the Shock:

The defining feature of the MOD Series is its QuickTune Technology — dry modular valve packs that can be swapped out while the shock remains on the vehicle. This industry-first design allows complete revalving 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; soft and firm packs are available separately.

Key Features:

• Double adjustable design with low-speed bleed for fully independent control of compression and rebound characteristics
• QuickTune Technology — modular valve packs swap out in minutes while shock stays on the car
• Remote nitrogen canister for ease of installation in tight engine bay configurations
• Indexable base eyelet — can be unbolted and repositioned for optimal shock and canister placement
• Compressed height: 10.13 inches | Extended height: 15.00 inches
• Includes 10-inch tapered pigtail spring rated at 400 lb/in
• Threaded aluminum shock body for ride height adjustment
• Compatible with OE stamped steel or QA1 tubular control arms
• 100% dyno tested and serialized
• Proudly made in Lakeville, Minnesota, USA
• Eligible for QA1's Limited Lifetime Warranty upon registration at QA1.net/Warranty

What's Included:

• MOD Series double adjustable shock body with remote canister
• 10-inch tapered pigtail coil spring — 400 lb/in spring rate
• Medium compression and rebound valve packs (standard)

Required Accessories (sold separately):

• Spanner Wrench: P/N T114W or T115W
• Thrust Bearing Kit (optional): P/N 7888-109

The QA1 MG501-10400A delivers an expansive force curve range and an unprecedented level of tunability, making it an ideal coilover upgrade for serious drag racing and pro-touring builds demanding precise, track-ready suspension control.