My guess is bushings. Maybe toe links? If it gets squirrely during bumps, I bet your are having toe management issues. Just a hunch, though...
I bet the launches have taken their toll on the poor little bits of rubber.
__________________
Go: Cobb S2+, Big Tom FMIC, CP-E DP & DCI, Royal Muffler, AR OC
Turn: TC Kline/Swift SA, Vorshlag Plates, UUC Front Bar, H&R M3 Rear Bar, VAC endlinks & spacers, Forgeline 18x9.5/NT05 265 Square
Stop: Endless MX72, Stoptech Rotors/Lines, Motul RBF600