I purchased the BMR Drag Spring set SP075 for my 07 GT500 and the part # on the rear springs is SP012RE and if you reference BMR's website SP012 is for an 07 - 14 Mustang GT. Just wondering if I have the correct rear spring before I install them. I thought this spring set was specific to the GT500. Anybody else running this spring set with the same issue or are these the correct rear springs? I also emailed BMR this question however their closed for the weekend.