QA1 HS05-12200 Proma Star Single-Adjustable Coilover Strut Kit Street 200lb

The QA1 HS05-12200 Proma Star Coilover Strut Kit is a single-adjustable, street-tuned coilover system engineered for the 2005–2014 Ford Mustang. Combining an inverted strut architecture with adjustable ride height and 18-position damping control, this kit delivers a meaningful upgrade in handling precision and stance over factory suspension components.

Inverted Cartridge Design:

A defining feature of the Proma Star platform is its inverted cartridge design. Unlike conventional strut configurations, the large-diameter shaft resists side loading, resulting in smoother, more consistent performance under hard cornering and braking.

Key Features:

• 18-Position Single Rebound Adjustment: Easily accessible adjustment knob located at the top of the strut tower allows quick damping changes without tools
• Adjustable Ride Height: Fully threaded body allows height adjustment from stock down to approximately 2.0 inches lowered using the threaded collar
• Street-Tuned 200 lb Springs: Powder-coated gloss black finish for corrosion resistance; ideal spring rate for daily street use with occasional spirited driving
• Aluminum Caster/Camber Plates Included: Lightweight anodized aluminum construction for precise suspension geometry and alignment tuning
• Bolt-In Installation: Fully bolt-in kit design for straightforward installation with no cutting or fabrication required
• Made in the USA: Designed, assembled, and serialized at QA1's facility in Lakeville, Minnesota
• Dyno Tested and Serialized: Each kit is dyno tested and serialized for quality control; fully serviceable and rebuildable at any QA1 authorized service center

This kit includes one pair of struts, 200 lb springs, aluminum caster/camber plates, and all related hardware. It is the ideal choice for Mustang owners who want a comfortable street ride with the ability to firm up damping for autocross or track days.