H&R 39177-2 Premium Performance Coilovers Aluminum Mono-Tube Street Coilover Kit

The H&R 39177-2 Premium Performance Coilovers represent H&R's most advanced street coilover system, engineered for drivers who demand the perfect balance of performance handling and everyday drivability. Unlike conventional twin-tube shock absorbers, these coilovers are built around a state-of-the-art mono-tube gas shock design that delivers superior damping consistency, improved heat dissipation, and a more responsive ride over a wide range of driving conditions.

The standout feature of the Premium Performance lineup is the use of ultra-lightweight aluminum front strut bodies, which dramatically reduce unsprung weight by 30 to 40% compared to stock struts. Less unsprung weight means the suspension can react more quickly to road irregularities, improving tire contact, cornering precision, and overall ride quality. Each aluminum strut body receives a black hard-anodized finish, providing excellent corrosion resistance along with a clean, aggressive aesthetic.

Developed by H&R's team of expert suspension engineers, the 39177-2 shares the core DNA of the acclaimed H&R Street Performance Coilover series while pushing further with its lightweight construction and premium materials. The system offers a lowering range of approximately 1.0 to 2.5 inches, allowing for a lower center of gravity, reduced body roll, and improved aerodynamic stance without sacrificing street comfort.

Key Features:

• Mono-tube gas shock construction for superior damping performance over twin-tube designs
• Ultra-lightweight aluminum front struts reduce unsprung weight by 30–40% vs. stock
• Lowering range of 1.0 to 2.5 inches on average for optimized stance and handling
• Black hard-anodized aluminum finish for durability, corrosion resistance, and appearance
• Engineered specifically for street use with comfort and performance in mind
• Developed by H&R's professional suspension engineering team

The H&R 39177-2 Premium Performance Coilovers are an ideal upgrade for enthusiasts seeking factory-quality engineering with measurable performance gains in handling dynamics and chassis control.