Eibach ERS 80mm Length x 60mm ID Coil-Over Spring (80-60-0140) Spring Rate:1027 lbs/in 2015 BMW M4 Convertible (w/o

2015 BMW M4 Convertible (w/o Adaptive M Suspension)

Hand-crafted carbon fiber rear diffuser

The package includes a set of front brake pads designed specifically for the listed BMW models

OE-style design engineered to meet or exceed factory standards for fitment and performance

Eibach ERS 80mm Length x 60mm ID Coil-Over Spring (80-60-0140) Spring Rate:1027 lbs/in 2015 BMW M4 Convertible (w/oCoilover Spring by Eibach A properly tuned spring system provides the muscle needed to transform the power derived from the engine of a racing car to the track through optimum adhesion. Suspension tuning is a precise balance. On one hand, the spring system should be soft enough to compensate for road irregularities assuring permanent road contact, while on the on the other hand the spring system must be firm enough to reduce the body roll, squat, and