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Costly
Nice wrapping but it's just a 4 gauge cable can't notice any difference alone....

Good product
After only having it on for a day, I’ve already noticed that fuel economy has increased, especially during highway speeds, and the rear defrost works way faster. Install was easy, but had to trim the fuse panel cover a little bit.


Poor design
Well I went to install the cable I had to modify the fuse Box by cutting a little bit which was simple but my complaint is the fitment when connecting it to the alternator stud is something that needs a little more thought because that boot is just not working which just cost me the money plus shipping to find out that I just wasted my money

Another innovative part from ZZ Performance!
I like this product. It ensures that there's constant voltage at the fuse box, which allows all your accessories to work better. I know you could probably do this with five bucks worth of wiring from the local auto parts store, but this is custom made for your W body and fits perfectly. Plus it's still cheap so I definitely recommend it!