QA1 Rear Suspension Conversion System for 1973-1986 Chevrolet C10 - GM 10-Bolt, Single Adj, Soft (170lbs/in) R130-170

Fits select 1973-1986 Chevrolet C10 and C10 Suburban models (including Big Ten, Cheyenne, Custom, Scottsdale, and Silverado). This QA1 rear suspension conversion system transforms your vintage pickup's utility-focused leaf spring setup into a high-performance, modern handling machine without requiring you to remove the truck bed during installation.

Engineered from the ground up, this system features a unique bolt-in torque arm design. Unlike traditional 4-link setups that can suffer from binding, the QA1 torque arm maximizes axle control and eliminates bind, resulting in a significantly smoother ride and more predictable cornering. The included single-adjustable coil-over shocks allow you to fine-tune the damping with 18 simultaneous compression and rebound settings, paired with 170lbs/in soft-rate springs for a street-friendly feel.

Achieve the perfect stance with integrated ride height adjustability, offering a range from 4 inches to 7 inches below the factory stock level. All components are manufactured in QA1's Lakeville, Minnesota facility, featuring 100% dyno-tested and serialized shocks for verified performance.

• Replaces factory leaf springs with a high-performance torque arm system
• Allows for 4-7" drop from stock ride height
• Includes single-adjustable coil-overs for precision valving control
• Soft-rate 170lbs/in springs for optimized ride quality
• Compatible with GM 10-bolt rear axles
• Full bolt-in installation with no bed removal required
• Made in the USA and includes all necessary mounting hardware
• Manufacturer Part Number: R130-170