Hey guys. I got an 09 g37x coupe with ark exhaust and r2c SRI (along with some other minor mods). I have the fabled lag people talk about and even after getting the reflash it still isn't 100% better. I have been reading that a grounding kit will help with this as well as smooth out other things but not really sure if it is really beneficial for me and what brand to get if I do go that route. Was just hoping you guys had experiences with some. Thanks!

 

Here's a thread for you: https://www.myg37.com/forums/d-i-y-i...-your-own.html