QA1 DD602 Proma Star Double Adjustable Coilover Shock 12-5/8in. to 18-3/4in. Bushing Mount

The QA1 DD602 Proma Star is a double adjustable coilover shock designed for custom chassis and suspension builds where direct-fit options aren't available. With a compressed height of 12-5/8 inches and an extended height of 18-3/4 inches, this shock is ideal for hot rods, restomods, and street or track performance builds requiring precise, tunable suspension.

The double adjustable valving system delivers 324 total valving combinations — 18 independent positions of compression adjustment and 18 positions of rebound adjustment — allowing the driver to fine-tune ride comfort and handling characteristics without removing the shock from the vehicle. Each click is carefully calibrated to deliver a consistent and predictable force curve with no jumps between settings.

Ride height is easily adjusted via the spring seat nut, and the shock can be mounted in any orientation — body up or down — for maximum installation flexibility. The bushing mount configuration features a 1-1/4 inch wide polyurethane bushing with included 1/2-inch and 5/8-inch diameter sleeves to reduce noise, vibration, and harshness (NVH), making it an excellent choice for street-driven applications.

Key Features:

• 324 valving combinations — 18 positions each of independent compression and rebound adjustment
• Compressed height: 12-5/8 in. / Extended height: 18-3/4 in.
• Recommended ride height: 15-1/4 in.
• Shock body diameter: 2 inches
• Requires 2-1/2 in. I.D. coilover spring (sold separately)
• Bushing mount: 1-1/4 in. wide with 1/2 in. and 5/8 in. sleeves included
• Mountable in any orientation — body up or body down
• Spring mounting hardware included
• 100% dyno tested and serialized
• Revalveable and rebuildable by QA1 factory or authorized service centers
• Precision machined aluminum body with PTFE-coated piston
• Centerless ground, hard chrome plated solid piston rod
• Three-step sealing system
• Proudly made in the USA — Lakeville, Minnesota
• Spanner wrench P/N T114W or T115W required (sold separately)
• Optional thrust bearing kit P/N 7888-109 (sold separately)
• Backed by a Limited Lifetime Warranty upon registration at QA1.net/Warranty

The QA1 DD602 Proma Star coilover shock delivers professional-grade adjustability and durability for custom suspension setups on the street or track.