Originally Posted by Hotrodz

I don't know if you are running any aero or not as I have a 5" front splitter and a APR gt300 rear wing. I had my FA coilovers rebuilt to 510 with Hyperco 800lbs front and 350 rear springs. I still think your rear springs are too stiff. The should be closer to 7k. You find them to be more compliant going over curbing and bumpy tracks. You may struggle with oversteer if your rear springs are over sprung.

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