i went to their puchong branch before, to install a midbox according to kweng84's recipe. guess what the workers there recommended me something else for my setup, they said kweng84 didnt know much about exhaust setup and his task is only to draw online buyers and then makan commission.

so i followed the workers advice and gained not much improvement over previous setup. so i was like 'ok at least the exhaust produces slower sound' despite the amount spent.

few months later, i went to cap ayam exhaust shop in Bidor, Perak to window shopping a bit. guess what, the taukey there said to me that the midbox i was using was not suitable for my car. he recommended me to change it to another type of midbox and then ok i'll try.

after installation i felt that the newer midbox gives me more improvement on acceleration and top speed compared to waiheng's. dang, i wasted my money on waiheng just for the sake of so called cheaper price.

moral of the story is: Their knowledge not good enough, subpar then cap ayam shop which can do o2 sensor relocation (the puchong branch dont ). But the workmanship is ok la.