LHU Performance Cams Stage:Stage 2 you will want the 3"

you will want the 3" exit option

Interlock flex is the 3rd solution and while is costs more

If your core head needs repairs

and connect 4 wires

08 Grand Prix (rear)

LHU Performance Cams Stage:Stage 2 you will want the 3"Duration at 1mm lash Lift: Stock cams 203. 6 int duration . 406" int lift 194. 0 exh duration . 406" exh lift ZZP Stage 1 212 int duration . 424" int lift 206 exh duration . 420" exh lift ZZP Stage 2 224 int duration . 438" int lift 218 exh duration . 420" exh lift Stage 1 cams: They install like stock cams and do not require aftermarket lash adjusters or special timing. Simply swapping out your stock cams for these will provide a substantial increase