H&R 39177-11 Premium Performance Coilovers with Aluminum Monotube Struts

The H&R 39177-11 Premium Performance Coilovers deliver an exceptional balance of street-ready performance and refined ride quality. Built around a state-of-the-art mono-tube gas shock construction, these coilovers represent a significant engineering advancement over traditional twin-tube shock absorbers, providing more precise damping response and improved heat dissipation.

A defining feature of the Premium Performance series is the use of lightweight aluminum front struts, which reduce unsprung weight by 30 to 40% compared to stock struts. Lower unsprung weight translates directly into improved suspension articulation, sharper handling response, and a more controlled, optimized ride. The aluminum struts are finished with a black hard-anodized coating for enhanced corrosion resistance, long-term durability, and a premium appearance.

Key Features:

• Mono-tube gas shock construction for superior damping performance over traditional twin-tube designs
• Ultra-lightweight aluminum front struts reduce unsprung weight by 30–40% over stock
• Lowering range of 1.0 to 2.5 inches (average) for a sportier stance and improved center of gravity
• Black hard-anodized aluminum finish for strength, corrosion resistance, and aesthetics
• Engineered for street use with performance-tuned spring and damping rates
• Designed and developed by H&R's experienced suspension engineers

The H&R 39177-11 shares the proven performance DNA of H&R's acclaimed Street Performance Coilover lineup, elevated with premium aluminum construction for enthusiasts who demand the best in both performance and weight savings.