what is the diff in the Pro-Kit vs. Sportline

[SexyTransAm]

what is the diff in the Pro-Kit vs. Sportline both from Eibach? im lookin to drop my car and i can fig out the diff. so tell me plz.

[Mr. Luos]

ProKit is a little more aggressive of a spring rate, but the Sportline will drop you about a quarter inch more.
If I recall correctly.

[SexyTransAm]

T T T

[Eugenio_SS]

several differences:

1st: drop.
Prokits will give you a close to perfect drop. ~1.25"-1.5" more or less.
Sportlines will drop more that that.

2nd spring rates.
fronts:
Prokits are linear, Sportlines are progressive.
Prokit: Front: 400lbs/in and Rear : 80-137lbs/in
Sportlines: Front: 314-589lbs/in and Rear : 51-143lbs/in

a few things to notice.
A, progressive vs linear... if you want both confort + handling, linear is the way to go so you can chose a shock that dampens the given spring rate.
Prokits wins in this point.

B, sportline offers very limited suspension travel compared to prokits, and the spring is softer, which basically gives you 2 choices, try to damp it, and bottom out vs overdamp, kill shocks and harsh ride... regardless on the choice, you'll get a harsh ride, without proper damping characteristics on the sportlines... they were badly designed and they shot themselves on the foot on this one.
Prokit wins on this point.

C, amount of progressivness.
you'll notice that the rear are both progressive, yet the range is not as dramatical on the prokits... so prokits will yield better hadnling,confort provided you put a shock that will work in that range. Not only that, sportlines in rear are riding on the bumpstops (bad for handling and confort)

Hope this helps.
btw, the color of the springs is different too... lol

[SexyTransAm]

that helps alot man thanks!!!!!

[StylesMcKnob]

How long does it take for the springs to wear out?

[third_shift|studios]

Prokit; you scrape your headers and Y everyonce n' a while.

Sportline; you get "beached" on small bumps in the road and need a tow truck to be pulled out.

[zero_proto]

i went with hotchkis after running the prokit, the car handles way better and offers a better ride, but i guess that also has to do with ths koni sa's.