These progressive spring rates are as follows: initial load rate is 399 lb/in in the front and 188 lb/in in the rear, and the peak load rate is 948 lb/in in the front and 485 lb/in in the rear. These springs were designed specifically around the R35 GT-R's stock Bilstein shocks, and lower the car .8 inches/20mm up front and .5 inches/15mm out back for an even, clean stance, and lower center of gravity. Springs are progressively wound, allowing them to retain a near OEM ride quality during day to day driving, but as the suspension compresses, they firm up to improve handling. The Eibach Pro-Kit is the perfect answer for most frequently-driven street cars. It's our legendary spring system that dramatically improves both a vehicle's performance and appearance.

Pro-Kit lowers your car's center of gravity, reducing squat during acceleration, body roll in corners and excessive nose-dive under braking. When combined with Plus-1 or Plus-2 wheels and tires, the Eibach Pro-Kit is the finishing touch to a winning recipe for performance. Pro-Kit also reduces excessive fender-well clearance, making your car look just as hot as it performs.

Every Eibach Pro-Kit is designed and tested by our suspension engineers and performance driving professionals, to deliver aggressive good looks and high performance handling, without ever compromising safety or ride quality. By using our proprietary, progressive spring design, Pro-Kit provides the ultimate balance to take your passion for driving to a whole new level.


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