Hyper Grounding Cables

Just curious if anyone has done this mod/upgrade/possible useless waste of $?? I've done this to cars I've had in the past and despite the claims of better flow and more horsepower my search results here have seemingly come up zero. I've only found one company offering these for our taco's so thus the curiosity.

I'm thinking of doing this as part of a stereo upgrade over the next few months so any input would be grateful.

Thanks in advance.......

 

I can't see how grounding could change horsepower. It makes sense to have the best possible electrical connections for a really high power sound system but if it's not being entered in competitions it's probably not a cost effective upgrade.

 

I figure it was addedd ballast, nothing more. I removed a good dozen of those grounding straps.

Honestly, how people come up with these scams is beyond me. If Toyota could improve your vehicle by adding $5 worth of grounding straps, believe me they would have done it already.