I purchased a set of Mantapart coilovers a long time ago. i think they are starting to go. alot of people have been telling me the only way to go is with Eibach sportlines and Koni yellows. Opinions?

How long is the life expectancy of the strut with the eibach sportlines?
how is the ride quality and handling improvement?

If this is a good way to go i was goign to wait to get the shocks and struts. i still have my OEM shocks and struts left at my moms.
what is the life expectancy with the drop springs on OEM pieces?

how will will the ride quality be with OEM pieces?

i was thinking about using the stock ones for a temporary fix for this year until i got the koni yellows (if thats the best way to go)
to fix my free play problem. the shock shaft of the coilover is actually loose from the body itself.

Also with the koni's do i run the stock upper strut mount? or does it comes with new mounts specifically for their application

tell me what you guys think?

With Sportlines, the Koni Yellows should basically outlast the car. The stock struts might outlast a tank of gas. Well, maybe it's not quite that bad, but you'd be lucky to get a few months out of them, and the ride will be absolutely horrible the whole time. Then you get to pay for another alignment after you replace them, unless you like scrubbing your tires off. Don't do it, if you can at all help it.




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Konis use the factory upper strut mount. The fronts are an insert into the OEM strut body though. Search for Koni Install here and you should be able to find a step by step instruction set. (Basically you take an OEM front strut, cut the top off to dump the guts out and then insert the Koni tube inside of it).

The rear struts just need the spring perch from the OEM struts. (Or coilover sleeve if you have threaded coilovers). The rear strut mount is OEM, but modified. You must drill out the hole to 1/2" because the rear Koni strut rod is bigger than OEM. Simple to do with a drill press.

Koni makes a Sport Kit that contains springs and struts, and are very well matched to our application. Approx 1.8" lowering all around. It puts the front control arms parallel with the road, and lowers the rear to even things out and get your CG down. I used that setup and was very happy.

I have read many good things about the sportline/koni combo here also.

The ride with Koni Sport kit ranges from Quite Firm to Kidney shaking depending on how you have the struts adjusted. Handling is GREATLY improved, especially when paired up with quality anti-roll bars (I used the Addco 25mm front and rear)

The nicest part about the adjustable struts is the ability to dial in how much over or understeer your car exhibits.

Koni struts have a lifetime warranty to the original purchaser, and I've never seen quality springs wear out. Your car will likely fall apart around your suspension if you do it up with Konis.


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Sleeper style, they don't see it coming that way.

i have yellows and sportlines and i can tell you the improvment over stock is 100% better... its night and day difference, the car handles like a dream and the stance is awesome.

i havnt had a chance to adjust them to a little bit stiffer because i havnt hit the 500 mile break in yet, but i have them set on full soft and the car still corners amazing, rides decent... pretty stiff compared to stock, but i like it better that way.

the install wouild be easy if you have everything stock still on the car, if you've had anything put on coilovers or otherwise and dont know what your doing your going to spend a lot of time getting every little bushing and ring etc right.

i recommend yellows and sportlines to the fullest.



Edited 1 time(s). Last edited Thursday, June 07, 2007 7:10 PM