QA1 Proma Star Front Coilover Strut Kit for 1994-2004 Ford Mustang

Tune front-end response without giving up bolt-in serviceability

QA1 HD03-12300 gives a 1994-2004 Mustang a matched front package with inverted double-adjustable struts, 300 lb/in springs, and lightweight caster-camber plates. The system is intended for handling-focused street and track setups with a 0-to-2-inch drop range.

Key Features

• HD03-12300 includes a matched pair of front Proma Star coilover struts
• Independent compression and rebound adjustment with 18 positions per circuit
• Inverted aluminum strut design reduces unsprung mass and resists side loading
• 300 lb/in coil springs are included for the handling package
• Adjustable aluminum caster-camber plates are included
• Ride height adjusts from stock height to approximately two inches lower

Fitment

Specifications

What's Included

• One pair of QA1 HD03-12300 front coilover struts
• Matched 300 lb/in coil springs, caster-camber plates, and related installation hardware
• Wheels, tires, brakes, alignment service, and unrelated suspension components are not included

About QA1

QA1 develops bolt-in performance suspension systems with rebuildable and tunable dampers. Its Proma Star packages combine application-specific spring rates, valving, mounting hardware, and alignment control for repeatable street and track setup changes.

Related Parts

• No internal companion part is linked because rear dampers, control arms, bump-steer hardware, wheels, and tires must match the exact Mustang chassis and intended setup.

FAQ

It is a complete front handling coilover strut kit for the supported 1994-2004 Ford Mustang application.

Yes. The verified kit contains one matched pair of front struts.

Yes. Each double-adjustable strut provides independent compression and rebound tuning.

The handling package includes 300 lb/in coil springs.

Yes. Lightweight adjustable caster-camber plates are part of the exact kit.

The threaded bodies allow adjustment from stock height to approximately two inches lower, subject to safe travel and clearance.

Yes. Set ride height first, then perform a complete alignment and verify bump travel, steering, brake-hose, tire, and wheel clearance.

QA1 advertises lifetime shock coverage after registration, subject to its current warranty terms and exclusions.

Installation Instructions

1. Confirm the 1994-2004 Mustang application and inspect every HD03-12300 component before disassembly.
2. Support the vehicle safely and follow the current Ford and QA1 procedures for removing the front struts, springs, and upper mounts.
3. Assemble the supplied springs and struts exactly as directed, preserving correct spring-seat and bearing orientation.
4. Install the caster-camber plates and struts with the supplied hardware, then torque every fastener to the documented specification.
5. Set equal preliminary ride height and damping, verify full steering and suspension travel, and correct any wheel, tire, brake-hose, or body interference.
6. Perform a complete alignment, road-test at low speed, and recheck ride height, torque, and clearances before performance driving.

California Proposition 65 Warning: This product can expose you to chemicals including antimony oxide and other chemicals known to the State of California to cause cancer or reproductive harm. For more information, visit www.P65Warnings.ca.gov.