QA1 Precision Products DD511 Proma Star Double Adjustable Coilover Shock

The QA1 DD511 Proma Star Double Adjustable Coilover Shock is engineered to deliver precise control over ride quality and performance for drag racing and high-performance street applications. This twin-tube shock absorber features dual adjustment knobs that provide 324 clicks of fine-tuning capability, allowing you to dial in the perfect suspension setup for any driving condition.

Key Features:

• Double adjustable design with 324 total clicks of adjustment on two independent knobs
• Twin-tube construction with clear anodized aluminum body for durability and heat dissipation
• Compressed height: 11.625 inches, Extended height: 16.0 inches
• 5/8-inch centerless-ground chrome piston rod for smooth operation and longevity
• Special valving designed to compensate for high shaft speeds while maintaining low shaft speed control
• 18 externally adjustable valve settings for improved track grip from end to end
• PTFE-lined bearings and polyurethane bushings for reduced friction
• Polyurethane top eyelet and spherical bearing bottom mount
• Aerospace-caliber sealing materials for reliable performance
• 2-inch shock body diameter with 2.5-inch spring diameter compatibility

QA1 Proma Star shocks are both serviceable and rebuildable by QA1 authorized service centers, ensuring long-term value. The dual adjustment capability allows independent tuning of compression and rebound damping, giving you complete control over your suspension characteristics. Designed and manufactured to meet the demanding requirements of competitive drag racing while remaining streetable for daily driving applications.