throttle body cleaning and port polish is 2 different thing... basically throttle body cleaning and carbon cleaning is jz brushing away carbon n dirt deposit around the intake and combustion... while porting requires precision cutting and grinding to make the intake port larger and smoother...

example of throttle body cleaning



throttle body before n after cleaning



carbon cleaning of combustion chamber involves removing the carbon buildup (black layer)



carbon cleaning of exhaust valve due to carbon buildup

any improvement after cleaning it??