We use quality Eibach springs in our kits, because they are the best! While Eibach is not the cheapest spring, we want to provide you with the best possible kit when you go to upgrade your ride with replacement springs. Eibach springs, combined with the features of our Schmidty Racing Suspensions hardware, create a spring kit that is second-to-none in the industry! Our spring kits, unlike others, don't require extensive preload amounts that cause shock body wear. We may not be the cheapest but the quality that you receive in our kit is second to none. Customers who have chosen our proven kits have been thrilled with the ride and performance we offer. Many of our customers originally used spring kits from our competitors before coming to us, but after being disappointed with others' results they tried ours and wholeheartedly affirm the superior quality.