QA1 52621-S600 Front Coilover Conversion System Single Adjustable 600 lb/in 5-7in Drop

The QA1 52621-S600 is a complete front coilover conversion system engineered from scratch for 1965–1979 Ford F-100 trucks—both bump side and dent side. This kit replaces the factory suspension with a modern, high-performance solution designed to deliver dramatically improved handling, steering precision, and ride quality.

Key Features:

• 5" to 7" drop with included drop spindles for a lowered, aggressive stance
• Single-adjustable coilover shocks with 600 lb/in spring rate for tunable ride and handling
• Tubular upper and lower control arms engineered for strength and reduced weight
• 3.75" narrower than a typical Crown Vic swap, enabling fitment of wider wheels and tires with improved cornering
• Saves approximately 150 lbs of front-end weight for improved responsiveness and agility
• Rack and pinion steering included for modern steering precision (based on Fox Body Mustang rack)
• Drop spindles sourced from a 1979–1981 Camaro; front brakes must be matched accordingly
• 100% dyno-tested and serialized shocks for guaranteed consistent performance
• All components proudly manufactured in QA1's Lakeville, Minnesota facility
• Upper and lower crossmembers, hardware, and an inner fender trimming template included

Installation Notes:

• Requires trimming of inner fenders (easy-to-use template included)
• Steering rack features a 9/16"-18 pressure port and 5/8"-18 return; adapter fittings to -6 AN are required along with custom -6 AN hoses
• Borgeson ¾-36 x ¾ DD connection (Part #013449) or similar recommended at steering rack
• Some engine/header combinations may require up to three steering U-joints
• Engine mounts are not included

The QA1 52621-S600 coilover conversion kit gives classic Ford F-100 owners a complete, bolt-in suspension upgrade backed by ISO 9001-certified manufacturing quality. Everything needed for installation is included—making this the definitive front suspension solution for your F-100 build.