I made this to see the difference between the 2 tires on the same car on the same track, different days. Is the lap time difference worth the cost is one question? They sure do make a great car even better. G3 setup was stock, G3R setup is 19x305 square, Apex 19x10.5 ET22, 2009 splitter, wickerbill, rear cradle lockout. I have another comparison with the car stock only difference was tires with similar lap time improvements.