Competition Orange, You have my vote, not that I'm bias...
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Thanks. Do the springs feel any stiffer than the R springs?
I ran my personal best laps at both Summit Point Main (1:24) and VIR Full (2:11), and Grand (3:06) in August and November!
Looking forward to staying consistent at 1:24 at SP, and breaking the 2:10 mark at VIR Full and into 3:05 on the Grand in 2018.
This was in a 2009 Mustang GT 3V 5.0 with 275/35-18 Hoosier R7s.