Ah shoot, I've forgotten about this thread lol. Well the grounding kit has made a big improvement on the electricals. The engine starts up and idles more smoothly, the subwoofer doesn't sound bogged down from its load. I've noticed an increase in mileage, such as driving 450kms on a tank without the GK then close to 500kms with the GK. The engine is where it counts for me, just feels better the with GK.