I was doing some research about the eibach sportline springs for my ls when on their website i found this :


EIBACH DRAG-LAUNCH Kit (Performance Springs)
# 9313.140

Front: 1.7 in
Rear: 1.3 in

Performance Springs

* Lowers 1/4-mile ET's
* Maximum Traction
* Consistent Launches
* Two Year Warranty

Success in drag racing requires hard, consistent launches at the starting line. Proper management of weight transfer is vital for success in the quarter-mile.

Eibach has the answer. Our Drag-Launch kits are engineered to do one thing: provide maximum traction to the drive wheels—front or rear—import or domestic.

Made of the same high quality materials as our Pro-Kit and Motorsport springs, Eibach's Drag-Laun


Anybody has any experience,feedback,pictures,comments about this springs?

Coilovers are definitely the way to go when looking for suspension, but since i already have k&b agx shocks with pro-kit springs installed in my car, i was just looking for a slightly better spring set than the pros. I do go the 1/4 mile ever since and then so that's why i need something that handles better than them.
Back to the subject i called Eibach to find out their spring rate and they only had the rear one, which is 256 lbs .The guy told me to call him back today for the front one. So far the rear one is better.

usually drag launch kits are really stiff in the rear and a lil softer up front...once you find out the front spring rates let me know

*Springs rates updated*
I called them back and they didn't have the front spring rate at all... Funny. So i ask him for the pro kit and sportline rates to compare them, and this i what they told me:
pro-kit:
front: drop 1.3, rate 331 linear
rear: drop 1.3, rate 126-194 progressive
sportline:
front: drop 1.7, rate 331 linear
rear: drop 1.7, rate 126-194 progressive
drag launch kit:
front: drop 1.7, rate ?
rear: drop 1.3, 114-257 progressive
I always thought the pro's and sport's had different rate, so i called them back to make sure and this time a chick answered and told me the same exact rates. But that's not what I'm looking for, my idea is to use the drag launch springs hoping they would be an ok all around spring (daily driving, occasionally track). So the only way to find out would be through try and error...since the rear have better rate and they still progressive, i might try them.

*Springs rates updated*
Call them back an this time they told me the front rate for the drag kit:
-pro-kit:
front: drop 1.3, rate 331 linear
rear: drop 1.3, rate 126-194 progressive
-sportline:
front: drop 1.7, rate 331 linear
rear: drop 1.7, rate 126-194 progressive
-drag launch kit:
front: drop 1.7, rate 245 progressive
rear: drop 1.3, 114-257 progressive