QA1 HD01-12200 Double-Adjustable Coilover Strut Kit for 79-89 Ford Mustang

Vehicle Fitment

• 1979-1989 Ford Mustang (2WD, front suspension, Fox-Body generation)

Features

• Double-adjustable valving with independent rebound & compression for precise tuning
• Inverted strut design with large-diameter shaft resists side loading during hard cornering
• Low ride-height adjustability: 0" to 2" drop below stock for stance or performance use
• Lightweight aluminium smooth-body construction for reduced unsprung weight and improved handling
• Complete kit includes coil springs and caster/camber plates for a bolt-in installation
• Optimised for street and performance driving - ideal for Fox-Body Mustang owners
• Made in the USA and manufactured to QA1's high precision standards
• Compatible with wide or narrow spindles on the 1979-89 Mustang platform

Specifications

• Part Number: HD01-12200
• Type: Coilover strut kit (front) for 1979-89 Mustang
• Valving: Double-adjustable (compression & rebound independent)
• Ride height adjustability: 0" to approx. 2" lower than stock
• Spring rate: 200 lb/in (typical for this kit)
• Mounting: Front strut tower with included caster/camber plates
• Includes coil springs, struts, plates, hardware - full assembly

Included Components

• 1x QA1 HD01-12200 Coilover Strut Kit (left & right, front)
• 2x Coil springs (matched pair)
• 2x Double-adjustable inverted struts (left & right)
• 2x Caster/Camber plates (aluminium)
• All required mounting hardware and installation instructions

Product Description

The QA1 HD01-12200 Proma Star Coilover Strut Kit is a high-performance front suspension upgrade designed for the 1979-1989 Ford Mustang Fox-Body platform. This kit replaces the factory struts and springs with a fully adjustable coilover solution that provides tremendous tuning flexibility. With double-adjustable valving, drivers can independently control rebound and compression to dial in ride quality, handling, or track performance.

Featuring a large-diameter inverted strut design, the HD01-12200 resists side loads under high-G cornering or aggressive braking. The lightweight aluminium body reduces unsprung mass, improving suspension responsiveness and traction. Ride height can be adjusted from stock down to approximately 2" lower, making this kit suitable for both street stance builds and performance setups.

This kit includes matching coil springs and caster/camber plates, allowing straightforward bolt-in installation on 1979-1989 Mustangs with stock front suspension geometry. Ideal for owners restoring a Fox-Body or building a performance street or autocross machine, the QA1 HD01-12200 offers a robust, tunable, and high-quality solution. Fitment is confirmed for years 1979 through 1989; coverage for later Mustang generations (post-1989) is not verified as of 2025.