So i installed a grounding kit after reading a DIY and i believe it made a difference.

Saved a lot of money making it myself, spent around $30

Look about 30 min to make the wires and another 30 to install

Overall please

Not the best pics i know







Thought id share.

 

NICE!!! Thinking about buying one made but it its possible making one I am down!! More info please! What kind of wires? And where did you find the DIY?

 

I also did this, I used 8 gauge OFC wire. I bought it from a local audio shop. It was about $1.50 a foot.

Here is a link to the diy on myg37: Click Me!

Very simple mod, honestly finding the parts was harder and took more time than actually making/installing it.

 

How is the shifting now?

 

I would say it is much smoother, audio received a bump in loudness, much less lag when giving gas also. My mpg also went up from 13.8 to 15.x but that could have been from the ecu resetting or the upgrade. I am not positive. I would say it made a noticeable difference and was worth the $30.