QA1 DS501-12200 HD Pro Rear Coilover Conversion System 3.0" Axle Single 200lb

The QA1 DS501-12200 HD Pro Rear Coilover Conversion System is a complete, weld-in rear suspension upgrade designed for performance street and track applications. Built around a 3.0" axle housing diameter with a 200 lb/in spring rate, this single-adjustable system delivers improved handling, ride height adjustability, and a significant upgrade over factory leaf spring or stock coilover setups.

The HD Pro series features QA1's single-adjustable shock technology, allowing you to tune compression and rebound damping to match your driving style and vehicle weight. The included 40" weld-in tube simplifies fabrication by providing a precision-fit mounting solution directly to the rear axle housing, ensuring proper geometry and alignment.

What's Included:

• 2x Single-adjustable coilover shock absorbers
• 2x Springs (200 lb/in spring rate)
• 40" weld-in tube for axle housing integration
• All necessary mounting hardware

Key Features:

• Single-adjustable damping — dial in rebound for street or strip performance
• 3.0" axle housing compatibility — fits common muscle car and hot rod rear ends
• Weld-in design — provides a clean, permanent, and precise installation
• 200 lb/in spring rate — suited for performance street and light track use
• Complete kit — includes shocks, springs, tube, and hardware for a full conversion

The QA1 DS501-12200 is ideal for classic muscle cars, street rods, and custom builds where a factory-style leaf spring suspension is being converted to a modern coilover setup. QA1's HD Pro line is engineered and manufactured in the USA, offering professional-grade components trusted by builders and racers alike.