many single scoll owner upgrade using after market like tomei extractor or SYMS extractor or xxxx brand but no more bubble sound liaw!
any one using after market extractor but still got strong bubble...
Anyone can give opinion on 3 Garrett turbo series, Garrett GT 28R, GT28RS aka Disco Potato and Garrett GT30R. Anyone have real life advise on those and how much those turbo cost in the market?