Do you have a sound system on your car ? If you don't, then I see no purpose in wasting .. eh .. spending roughly P5k for grounding kits. Coz aside from porma, it doesn't serve any purpose on a stock car with a stock ICE.

Moreover, grounding kits do not boost up a car's horsepower nor torque rating. If ever it does, it will just be VERY VERY minimal. Such as ... 0.1 ?