QA1 HD01-12300 PromaStar Double-Adjustable Coilover Strut Kit 300lb Handling

The QA1 HD01-12300 PromaStar Coilover Strut Kit is a complete front suspension upgrade engineered for maximum handling performance. Featuring an inverted strut design, 18-position double-adjustable damping, and a 300 lb handling spring rate, this kit delivers precision control for street performance, autocross, and road racing applications. Designed as a fully bolt-in system, installation is straightforward with no cutting or welding required.

Inverted Cartridge Design:

The Proma Star's inverted cartridge strut is a key advantage over conventional designs. The large-diameter shaft resists side loading, ensuring smoother and more consistent performance during hard cornering and braking. The lightweight construction helps reduce unsprung weight for improved handling response.

Key Features:

• Double-Adjustable Damping: 18-position knob independently tunes rebound and compression for precise handling adjustments tailored to any driving condition
• Accessible Adjustment: Adjustment knob is conveniently located at the top of the strut tower, accessible under the hood
• Ride Height Adjustability: Fully threaded body allows height adjustment from stock to 2.0" lowered via the threaded collar
• 300 lb Handling Spring Rate: Track-ready springs are powder-coated in a gloss black finish for corrosion resistance
• Lightweight Aluminum Caster/Camber Plates: Anodized finish resists corrosion while enabling precision suspension geometry and tire wear adjustment
• High-Performance DOM Steel Construction: Superior strength for demanding performance use
• Compatible with Wide and Narrow Spindles: Fox Body 79-89 applications work with both spindle types
• Made in the USA: Proudly manufactured in Lakeville, Minnesota
• Dyno Tested and Serialized: Each kit is individually tested and serialized for quality control
• Fully Serviceable and Rebuildable: Serviceable at any QA1 authorized service center

Kit Includes:

• One pair of Proma Star inverted coilover struts
• 300 lb rate coil springs (pair)
• Aluminum caster/camber plates
• All related mounting hardware

The QA1 HD01-12300 PromaStar kit is the ideal choice for Fox Body Mustang enthusiasts who demand the absolute best in front suspension performance, adjustability, and stance control.