H&R 51671 Street Performance Coilover Kit Mono-Tube Adjustable Lowering

The H&R 51671 Street Performance Coilover Kit is engineered specifically for street use, delivering a refined balance of ride comfort and handling performance. Unlike conventional twin-tube shock absorbers, these coilovers utilize a mono-tube gas shock construction — a superior design that improves heat dissipation, response consistency, and overall ride quality.

H&R is widely recognized as the originator of the true street coilover system, and the 51671 continues that legacy. Each shock is individually tuned with a progressive rate spring designed from the ground up to work in harmony with the shock's internal valving, resulting in a cohesive and precisely calibrated suspension system suitable for daily drivers and enthusiast tuners alike.

Key Features:

• Mono-tube gas shock construction — superior to traditional twin-tube designs for improved performance and heat management
• Fully threaded shock body for precise, adjustable ride height lowering
• Lowering range of approximately 1.0 to 2.5 inches on average
• Progressive rate springs tuned to match shock valving for a unified suspension response
• Balances everyday ride comfort with enhanced handling and cornering performance
• Engineered and tuned by H&R suspension specialists

H&R coilovers are built to OEM quality standards and beyond, making the 51671 an ideal upgrade for drivers seeking improved stance, better handling dynamics, and a ride quality that doesn't sacrifice daily drivability.