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What is the original size of the front sway bar?!
I've seen many articles about installing RSX rear sway bar,
does anyone consider their front actually?!

 
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It depends what year Civic you've got. The '01's and '02's have a 25.4mm front sway bar. The '03's have a 15.9mm front sway bar. I guess if you've got an '03, then you could upgrade to the '01's or '02's front sway bar. You'de also need to upgrade the rear sway bar to even out the handling though. I have an '01 front sway bar off of my LX for sale. Along with everything you need to install it. Check it out: FS: 2001 Civic LX Front Sway Bar & Bushings & Brackets & Bolts

 
Rep Power: 424

The stock 25mm front and the 19mm RSX rear actually gives you a pretty neutral combination... so there really isn't much of a need to change it. Besides the RSX front is bent differently since the engine is on the other side of the engine bay.

 
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also, by increacing the roll resistance on the front of the car you'll more then likly end up with more understeer. I think thats why Honda went with the smaller bar on the later models. (that also depends on the spring rate of the 03's too).

any one konw where we can find the stock spring rates?

 
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they are worth it