Wah lan eh, topics as old as 4 years ago still can find it back & bump it wor? Champion ler u guys here. I moons years didn't login to ZTH.com as been too busy with job & commitments.
Bro out there ... anybody can help me on this problem ??
When i boost my engine to 1bar ... after 4000rpm .. the exhaust got blow sound .... and the car can't go smooth ....