testi from me.
i din buy the spark plugs from TS but i just installed a same set on my old Ford Laser car with 500k++ mileage! previously, my car shake like fcking earthquake whenever i have to drive over bumps or while waiting at the traffic. and another think to note, is when i drive to school every morning, i have to ignite the engine like 5 minutes earlier to warm the engine up.. NOW after installed it, i don have to do so... just like this few days, ignite it, directly hit the gas! no problemo.. car run smooth as silk.. no more shakes, no need to warm the engine b4 drive. and of cos, can feel the PAWAR!!

next project, gotta change the car filter to K&N air filter! hehe....