Proma-Star C/O Shock - Adjustable

The Proma-Star C/O Shock - Adjustable (QA1 model DS402) is a professional-grade coilover shock absorber engineered for vehicles requiring tunable suspension geometry and damping control. Built by QA1, a trusted manufacturer in the performance suspension industry, this adjustable shock delivers the flexibility serious enthusiasts and mechanics demand when fine-tuning ride height, spring rates, and shock response. Whether you're optimizing handling for street performance, track days, or show car aesthetics, this shock provides the adjustability to dial in your vehicle's dynamics precisely.

The adjustable damping mechanism allows you to alter compression and rebound characteristics without removing the shock from the vehicle, a critical feature when dialing in suspension balance across different driving conditions. QA1's Proma-Star design incorporates monotube or twin-tube construction optimized for consistent performance across varying loads and temperatures, reducing fade during extended driving or competition use. The compact 4 x 3.6 x 19.3-inch profile and 3.81-pound weight rating indicate a purpose-built application, with the adjustable preload collar enabling height changes while maintaining damping curve integrity—essential when matching spring rates to lowering spring kits or adjusting clearance for body modifications.

This shock suits builders working with coilover systems, independent suspension platforms, or vehicles with separated spring and damper design. Mechanics upgrading older muscle cars, street rods, or modern performance platforms will appreciate the independent adjustment capability, which eliminates the need for multiple shock purchases when tuning for different setups. Installation requires proper spring seat alignment and ride height verification; always measure corner weights and verify geometry following adjustment to maintain proper camber and anti-dive characteristics. The Proma-Star C/O Shock - Adjustable pairs best with complementary coilover springs and quality control arms to deliver the responsive, tunable platform serious drivers expect.