QA1 MG401-11250A Pro-Coil MOD Series Double Adjustable Coilover Kit 250 lb/in Tapered Pigtail Spring

The QA1 MG401-11250A Pro-Coil MOD Series Coilover Kit is a double-adjustable, stock-mount front coilover system featuring a remote canister design and an included 11-inch tapered pigtail spring rated at 250 lb/in. With a compressed height of 8.63 inches and an extended height of 12.63 inches, this kit is engineered for high-performance drag race, pro-touring, and street performance applications.

At the heart of this system is QA1's proprietary QuickTune Technology — dry modular valve packs that can be swapped out quickly without removing the shock from the car or exposing the shock oil to contamination or debris. This makes it possible to completely re-valve the shock in minutes to adapt to changing track conditions or driving preferences.

Key Features:

• Double adjustable design with independent low-speed bleed adjustment for fully independent control over compression and rebound characteristics
• QuickTune Technology — modular valve packs swappable on the car without interrupting the oil path
• Medium compression and rebound valve packs included standard; soft or firm packs available separately
• Lightweight billet aluminum body construction for reduced unsprung weight
• Fully threaded shock body allows ride height adjustment for stance and corner-balance tuning
• Remote nitrogen-charged canister with indexable base eyelet for flexible mounting in tight spaces
• Includes 11-inch tapered pigtail spring at 250 lb/in spring rate
• Stock mount configuration for straightforward bolt-in installation
• Sold as a pair; serviceable and rebuildable by QA1 Authorized Service Centers
• 100% dyno tested and serialized; proudly manufactured in Lakeville, Minnesota, USA

Designed for drivers who demand the broadest possible tuning range, the MOD Series coilover kit delivers an expansive force curve capability suited for everything from casual street use to competitive motorsport. The high-travel spring design features fewer coils and a smaller wire diameter, reducing unsprung weight while improving suspension response.