We have similar bite at SIR also indoor asphalt just no VHT application in the past. We run Pink or x2 Pink. All depends on your steering choice. The DP will have a little more bite but is also a little freer in the turns. For front we usually run Purple I have messed around with DP fronts but never spent alot of setup time with it on the car. My personal pref for SIR is Jaco DP rear with Parma Pur front.