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Here is some more info for the file:
Tanabe makes two versions of the GF210...one for the LX/EX and one for the Si. I have the details on the Si model:
They are also Linear.
Front drop = 0.6"
Rear drop = 0.5"
Front rate = 3.4kg/mm
Rear rate = 4.1kg/mm
They also make their DF210 springs for the Si. The GF210 series is described as being 20% to 30% stiffer than stock, whereas the DF210 series is described as being 15% stiffer than stock, yet these two sets of springs have the same spring rates! The only difference is the drop. However, the GF210 lowers the car 0.1" more in the front, whereas the DF210 lowers the car 0.1" more in the rear. But obviously Tanabe feels really strongly about these particular spring rates, for some reason. Anyways, here are the specs on the DF210 springs as well:
These are also linear.
Front drop = 0.9"
Rear drop = 1.0"
Front rate = 3.4kg/mm
Rear rate = 4.1kg/mm
I almost bought the GF210 springs, but then I found out that Swift is going to be releasing their Sport Mach lowering springs for the Si in the next couple of months, so I'm waiting to see the details on those before making my final purchase...but the Swift's basically already have my vote.
Although, based on the specs above (and thanks FA5SI!!), the Progress springs kinda intrigue me now, particularly since they sell for like $150 or something. Does anyone have them installed, and if so, how do you like them??
Brian
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