QA1 GS401-10450C Single Adjustable Front Pro-Coil Kit 10" 450 lb/in

Regular price: $789.95
Regular price: ~~$875.14~~
Sale price: $789.95

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In Stock: 20

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Product Specification:

SKU:QAPGS401-10450C

MPN: GS401-10450C

UPC: 806990062161

Weight: 22.7 lb

Inventory: 20

Type: Coilovers

Vehicle Fitment

Front suspension - GM coil-spring type vehicles converting to coil-over style (verify control arms & mounts)

Features

Single-adjustable valving - one knob controls damping for street or performance use
Includes 10" free-height coil springs rated at 450 lb/in
Threaded shock body allows ride-height adjustment (approx 0" to -2" drop) when paired with spring seat
Bolt-in design compatible with factory stamped or QA1 tubular front control arms
Aluminium body construction reduces unsprung weight and improves responsiveness
Made in the USA, serviceable and rebuildable for long-term use
Ideal for street rods, restomods and classic GM builds converting to coil-over fronts
Limited lifetime warranty eligible when registered

Specifications

Part Number: GS401-10450C
Type: Front Pro-Coil Shock System - Single Adjustable
Spring Free Height: 10.00 inches
Spring Rate: 450 lb/in
Adjustment: Ride-height adjustable (via threaded bodies) and damping adjustable
Mounting: Front coil-spring conversion, verify upper stud or T-bar mounts and geometry
Sold as: Kit (left + right shocks + springs + hardware)

Included Components

2x QA1 front coil-over shocks (single adjustable)
2x 10" free-height coil springs rated at 450 lb/in
Installation hardware including adjuster collars and mounting bushings
Installation instructions & warranty registration card

Product Description

The QA1 GS401-10450C Single Adjustable Front Pro-Coil Kit is built for classic GM vehicles converting to a coil-over front suspension. This kit features 10" free-height springs at 450 lb/in, paired with single-adjustable shocks that allow you to fine-tune the ride quality from comfortable street to sporty handling. With threaded bodies you can adjust ride height up to approximately 2" down without changing springs.

Designed for bolt-in use with factory or QA1 tubular control arms, it helps preserve or enhance front suspension geometry while giving you the adjustability and performance flexibility of a modern coil-over system. The aluminium shock bodies reduce unsprung mass and improve responsiveness, making this kit ideal for street restorations, restomods, or performance builds.

Before installing, ensure the vehicle has front coil-spring suspension (not torsion bar) and that your mounting geometry supports the spring seat and shock length. This kit is current and available as of 2025; however, direct fitment years/models must be verified via QA1's official fitment chart for your specific vehicle make, model, engine and drivetrain.