Hi guys,
I just found HKS super drager in chop choi shop.Planning to buy it to replace my old wei yip muffler.The drager got 3'++ inner and the tip outlet i think 4'inch++.Is it can increase hp n is it silent.I love...
anyone stick the bitumen on the firewall, at the engine side before?what is the effect for sound proofing ?is it noticable?bcoz at 1st i tot wanna open up the dash and put bitumen+superlon...but dare not to kacau the...