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Ah, thanks, Larry! The track was sooo good that day. :)

Both will improve performance. However, the Pro-Kit for these cars has a slightly higher spring rate than the Sportline. Probably the only application where this is going to be true. Pro-Kit rate = 257lbs/in front | 137lbs/in rear Sportline rate = 240lbs/in front | 130lbs/in rear

I need to get a legit cage fabbed up for sure. As of right now the car still sees the street and gets driven to the track so the 4 point will have to do for now. Buttonwillow CCW is really fun but is actually about 2 seconds slower than CW. I didn't hit 5th gear at all going CCW but usually...

This is time attack so we're only required to have a 4 point roll bar which I have.

Thank you! The track is Buttonwillow Raceway but we ran it backwards this day (counter clockwise). Most people run the track clocwkwise.

Sick! :nice:

Here's a video of me chasing my buddy in the JRZ EK9 with a K20R. I'm in the EG below with B18C5. Both of us compete against each other in the HFF Challenge series out here in California. A picture of my car below for reference. http://www.youtube.com/watch?v=8I6vpC7Yyx4

Back to the original question, the Eibach Pro-Kit will work with factory shocks. We don't do any guess work at Eibach.

I work at Eibach USA and have these on my track car. I've never seen this happen before...EVER. We're glad you caught it before anything major happened.

Post the part numbers stamped on the springs from the front and rear.

The ek9 shocks shouldn't effect the drop. The only way I could think of the EK4 not seeing the correct drop would be if the lower control arms were removed and torqued back down without preloading the suspension. Or, they had the wrong springs installed.

The drop on the EK9 chassis will most likely be different as these were tested and measured on the base model civics.

Thanks. Yes, it is a nice change from HT. Since they went to bulletin forums I've been spending a lot of time over at nwp4life.

Hello! I'm Tony and I work at Eibach Springs in Corona, CA. I get a lot of links sent my way for Eibach inquiries from this site and I've been lurking for quite some time now. I thought it'd be best to join and contribute anything I can to the forum. I'm a huge Honda enthusiast having...

The Sportline springs don't have the Eibach logo stamped on them. Just "sportline" and the part number.