ops! sori bos..changed already hehe..IMO, any extractor with a jasma tag on it or at least made in japan will definitely output more power than the OEM extractor. Regardless, many claim that racing headers offer best results but it also depends on the exhaust setup as well. If Cusco pball can only perform better with cams, I dont see why any other extractor cant perform better with cams. If running cams, I believe even the stock extractor can perform better.
Btw, pls edit the title which says "Cusco Spiral" as the only spiral extractor is from Apexi. The best setup is still to use the complete exhaust system (HKS extractor + HKS piping + HKS exhaust).
many opinions i got here.. 1 more question, what if i rojak between; let say FGK header with APEXi N1 exhaust system? gud or not? i love apexi n1 gua..




