Ok, so this weekends project is installing my version of the "grounding kit." Unfortunately, it's raining outside so I must wait for that minor hold up to pass before I get started. In the meantime, here is a pic of all the parts you'll need. Included is:

-12 ft of 4 gauge grounding/power cable cut into 32,30,29,21 and 16 inch segments. (purchased at cowboy maloney). $24.00
-2 6M 10mm bolts, 3 6M 20mm bolts, several washers. (all purchased at autozone). $5.00
-10 4 gauge, gold plated ring terminals. (purchased at a local audio store). $15.00

Tools needed:
-Crimper. (purchased at home depot). $8.00
-10mm Socket and wrench
-measuring tape

 

A pic of the connection to the front of the engine:

 

A pic of the engine compartment with the cover off:

 

The finished product:

 

insaneamine has a wonderful post on the installation of a grounding kit. VERY DETAILED, moreso than I would have the time to post. I would check that out; just go to forums and click on the mods for performance and he should be one of the first you see with like thousands of views!! It's a great post.
As for why I built my own? I live for this stuff. If you like to make your own stuff and put it to the test you could save a little money by making your own. However, insaneamines kit is very nice and it comes prepackaged. I spent all day searching for parts around town. The big difference between my kit and his is that my ring connectors have a red shrink rap as opposed to grey. Anyway, good luck!!

 

HUM, well, the grounding kit is installed and now for the critique. I seriously do think the engine is smoother in the upper rpms. I drove the car hard several times before installing the kit and several times after and there IS a difference. As for power? I doubt it. Some people are claiming like 1-2hp with dynos "to prove it" but these power differences are within the dyno machine's standard of error. You would need to do multiple dynos and average them to tell for sure and that would be a bit excessive for 1-2 hp. And *** for being able to "feel" 1-2 hp, well that's like a .007 increase over stock. If you can "feel" that, your cerebellum works a lot better than mine; you should probably be working in some NASA lab. So was it worth it? I do like the smoother power band, it makes it feel like the car is not having to work as hard to make HP. But on the flip side, parts and tools were relatively expensive and it took some time to install. So, If you don't mind dropping 50 bucks for a smoother engine, go for it! The connection points are predrilled which tells me Nissan meant for this kit to be on the car, and several racing teams are using them.