QA1 DM501-2501 HD Pro Rear Weld-In Coilover Conversion Kit MOD Series 250lb/in 3.25in Axle

The QA1 DM501-2501 Heavy-Duty Pro Rear Weld-In Coilover Conversion Kit is a complete rear suspension upgrade solution designed for 3.25-inch axle tubes. Built for vehicles with rear axle weights between 1,700 and 2,600 lbs., this kit delivers a robust, street-and-race-ready coilover system using QA1's advanced MOD Series dual-adjustable shocks.

At the heart of this kit are two MOD Series coilover shocks, engineered for builders who demand maximum tunability and aggressive force curves. These shocks feature modular valve packs that allow valving changes without removing the shocks from the vehicle — a major advantage for serious performance builds. Double-shear bracketry and increased spring rates provide the structural strength needed for demanding street and track use.

Ride Height Adjustability:

• Axle-mounted brackets offer ¾-inch increment adjustments for coarse ride height tuning
• Coilover shock provides additional fine-tune adjustment capability
• Combined total of 9 inches of ride height adjustability

Kit Contents:

• Two (2) MOD Series dual-adjustable coilover shocks
• Two (2) 250 lb/in. coilover springs
• 40-inch weld-in tube (1-5/8" O.D. x .095" wall)
• Axle mount bracketry
• Upper shock mounts and tubing
• All mounting hardware

Installation Notes:

• Welding required — designed as a weld-in conversion
• Designed specifically for 3.25-inch axle tubes
• Requires QA1 spanner wrench T114W or T115W (sold separately)

Proudly made in the USA at QA1's facility in Lakeville, Minnesota, this kit is backed by QA1's best-in-class lifetime warranty on shocks when registered at QA1.net/warranty.