QA1 GD401-10450A Double Adjustable Pro-Coil Front Kit 10" Spring 450 lb/in GM

Vehicle Fitment

• Front position, GM performance and restoration applications using front coil-over conversion

Features

• Double-adjustable valving (independent rebound & compression) offering 324 tuning selections
• Bolt-in front coil-over kit includes 10" free-height spring rated at 450 lb/in
• Threaded shock body allows 0 to -2" ride-height adjustment for stance or performance setups
• Aluminium smooth-body construction reduces weight and enhances responsiveness
• Includes coil springs, shocks and mounting hardware for front installation
• Compatible with OE stamped or QA1 tubular front control arms - simple installation
• Made in USA; eligible for QA1 limited lifetime warranty when registered
• Designed for street, autocross or mild track use with full adjustability

Specifications

• Part Number: GD401-10450A
• Kit Type: Pro-Coil Front Shock System (Double Adjustable)
• Spring Free Length: 10.00"
• Spring Rate: 450 lb/in
• Height Adjustment Range: approx 0 to -2" from stock
• Valving Selections: 324
• Mounting: Upper stud mount / lower T-bar (front) - for GM coil-over conversion

Included Components

• 2x QA1 coil-over shocks (front) - double adjustable
• 2x 10" free-height coil springs rated at 450 lb/in each
• Hardware kit for installation (mounting bushings, springs seats, adjusters)

Product Description

The QA1 GD401-10450A Pro-Coil Front Shock System is a premium front suspension upgrade for GM vehicles converting to coil-over front ends. The kit features a 10" free-height spring rated at 450 lb/in, paired with fully independent compression and rebound adjustment (324 possible settings) to let you tailor ride quality and handling precisely. The threaded body design provides up to approximately a 2" drop in front ride height without altering spring rate.

As a bolt-in system compatible with stock or aftermarket control arms, this kit simplifies the transition to a coil-over front setup while maintaining excellent tuneability and build quality. The aluminium body shocks reduce unsprung mass, improving responsiveness, and the kit is built for modern restoration or performance applications seeking firm but comfortable ride control.

Ideal for GM restorations, street/strip builds or performance-street cars seeking adjustable front suspension with premium components. Because it's not a simple shock replacement but a full conversion kit, it is essential to ensure your vehicle's front geometry, spring seats and clearance are suitable. Fitment is universal to GM front coil-over builds; as of 2025 the part is current and active. Confirm installation specifics such as mount type (stud top, T-bar bottom), spring rate suitability (450 lb/in) and ride-height intention before purchase.