Quote:
Originally Posted by Gene K
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The GT500 rear springs have exactly the same free length (by measurements) as the BB Data Plate (BC Spring) that came on my base GT Deluxe. So to me it appears it would have to have a taller installed height since its 17% stiffer.
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Precisely, since the weight of the car would compress it less.
There's a possibility there. Ford really seems to have many different spring choices for the S197. For the 2010, it wouldn't surprise me if the rear springs were the older GT500 ones (purple or light gray in color). I think there's only two rear spring choices for the 07-09 GT500. Any other color would indicate a GT spring (white, yellow, orange, blue, etc.).