H&R 50377 Sport Spring Lowering Kit for BMW 640i Convertible

The H&R 50377 Sport Spring Kit is a precision-engineered coil spring lowering kit designed to improve handling performance and give your BMW 640i Convertible a more aggressive, sport-tuned stance. Manufactured at H&R's ISO 9001 certified facility in Germany, these springs are built to exacting standards with no compromise in quality or ride comfort.

H&R Sport Springs are crafted from a proprietary 54SiCr6 spring steel, rated at an impressive 290,000 PSI tensile strength, delivering unrivaled resiliency and long-term durability. Unlike generic lowering springs, H&R's progressive engineering ensures the spring retains its shape and rate over years of use — no sagging, no settling.

Key Features:

• Lowers vehicle approximately 1.5–2.0 inches on average
• Made from 54SiCr6 high-strength spring steel — rated at 290,000 PSI
• Manufactured in H&R's ISO 9001 certified engineering facility in Germany
• Improved handling and cornering response without sacrificing daily drivability
• Superb ride quality — street-tuned for comfort and performance
• Direct OEM-style fitment — no modifications required
• Reduced body roll and improved aerodynamic profile

H&R Sport Springs strike the ideal balance between performance and comfort, making them a top choice for enthusiasts who want enhanced driving dynamics without the punishing ride of coilovers or stiff racing springs. The H&R 50377 is a direct-fit replacement that installs using standard tools and works seamlessly with OEM and most aftermarket shock absorbers.