QA1 MG401-10350C MOD Series Pro-Coil Double Adjustable Coilover Kit with 10in. 350lb/in Spring

The QA1 MG401-10350C is a MOD Series Pro-Coil front coilover kit featuring twin-tube, double adjustable aluminum shock bodies with a remote nitrogen canister and a 10-inch, 350 lb/in large tapered flat spring. Engineered for high-performance drag racing, autocross, road course, and pro-touring applications, this kit delivers an unmatched combination of adjustability and on-car serviceability.

QuickTune Technology: The defining feature of the MOD Series is its patent-pending QuickTune system — dry modular valve packs that can be swapped out in minutes while the shocks remain installed on the vehicle. Re-valving is performed without interrupting the oil path or exposing the shock internals to debris or air contamination.

Key Features:

• Double adjustable valving with independent low-speed bleed adjustment for fully separate control of compression and rebound characteristics
• 576 valving combinations for an expansive force curve and unprecedented tunability
• Medium compression and rebound valve packs included as standard; soft and firm packs available separately
• Lightweight billet aluminum shock body with black finish and 3.000 in. body diameter
• Spherical bearing mounts — eyelet upper and eyelet lower
• Compressed length: 8.63 in. | Extended length: 12.63 in.
• Threaded body allows 3.000 in. of adjustment range with 0–2.0 in. of ride height lowering capability
• Remote nitrogen canister with indexable base eyelet — repositionable to accommodate tight engine bay configurations
• Includes: 10 in. large tapered flat spring (part 10HTBF350) rated at 350 lb/in, Torrington bearings, and coilover hardware
• 100% dyno-tested and serialized at QA1's Lakeville, Minnesota facility
• Serviceable and rebuildable by QA1 authorized service centers
• Made in the USA

The fully threaded shock body provides precise ride height adjustment to dial in the perfect stance or fine-tune front-end weight balance. Sold as a kit. Welding is not required for installation.