QA1 GD401-11250C Front Pro Coil Double Adjustable Coilover System 11in 250lb/in Aluminum

The QA1 GD401-11250C is a front Pro Coil double adjustable coilover shock kit built for GM muscle car applications. Constructed with a lightweight billet aluminum shock body, this kit delivers a potent combination of ride height adjustability and independent valving control, making it equally capable on the street or the track.

Double Adjustable Valving — the hallmark of this system — allows compression and rebound to be tuned completely independently of one another. This provides a wide range of tunability whether you're drag racing, autocrossing, road course driving, or daily driving.

The kit includes an 11-inch high-travel coil spring rated at 250 lb/in featuring a large tapered flat end, with a compressed length of 10.13 inches and an extended length of 14 inches. The spring features fewer coils and a smaller wire diameter than standard springs, resulting in reduced unsprung weight and faster suspension response. Up to 2 inches of ride height adjustment can be dialed in via a simple turn of the spring seat nut, with no cutting or welding required.

Key Features:

• Double adjustable coilover shock with independent compression and rebound tuning
• Lightweight billet aluminum shock body construction
• 11-inch spring, 250 lb/in rate, large tapered flat end
• Compressed length: 10.13 in | Extended length: 14 in
• Up to 2 inches of ride height adjustability
• Bolt-in design compatible with OE stamped steel or QA1 tubular control arms
• High-travel, USA-made coil spring with reduced unsprung weight
• 100% dyno tested and serialized
• Serviceable and rebuildable by QA1 authorized service centers
• Eligible for QA1 Limited Lifetime Warranty (registration required at QA1.net/Warranty)
• Made in Lakeville, Minnesota, USA
• Sold as a pair (kit)

Accessories Required: Spanner wrench P/N T114W or T115W (required for installation). Thrust Bearing Kit P/N 7888-109 is available as an optional upgrade.

QA1's Pro Coil system is an ideal front suspension upgrade for GM muscle car owners seeking improved stance, handling, and performance without major fabrication work.