Known issue for the S550 and there is a TSB for it. Basically, check your harness for the right muffler. It may be hitting the body seem and braking the wires right at the connector.
Here’s my take on the whole suspension dilemma most of us face. For perspective, I have owned a 16 GT350, 18 GT PP1, 20 Bullitt w/Magneride and a 22 Mach 1 Magneride.
If you are just using the GT as a daily driver/weekend fun car, the base suspension is quite capable to handle the curvy roads...
Here’s my take on the whole suspension dilemma most of us face. For perspective, I have owned a 16 GT350, 18 GT PP1, 20 Bullitt w/Magneride and a 22 Mach 1 Magneride.
If you are just using the GT as a daily driver/weekend fun car, the base suspension is quite capable to handle the curvy roads...