What are the lifespan on eibach or racing beat springs? I want to buy one that would last me longer....

 

Why? What is you use for the car, DD, autocross, roadrace dragstrip. Choose the spring for the driving style/use of the car and what you want the springs to do for you, not which one will last the longest. You will be replacing other parts more than once before you replace the springs.

 

Yep, Like Trochoid said, minimum is like 5~6 years for garbage stuff, either eibach or RB should last at least 10, and long before then you will be changing out many other things. Pick the spring for the application.

kenn

 

Either will be fine because they are quality springs. They aren't going to lose stiffness, its the cheap ones that will lose free height.

 

Eibach are world class springs with very repeatable spring rates, they are used from the factory for such cars as (some models) Porsche, Ferrari and other exotics, this is what sways my preference.

 

I drive my car in the mountain about four times a month, and track once in a while... RB and eibach have similar spring rates, and someone is selling used eibach springs that were used for 15000 miles so i want to make sure that they will last me some time...

 

They'll last a very long time, go for it, you wont be disappointed with them, short of coil overs they're as good as you'll get

 

If you can pick them up for under 125, buy them.