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How much extra spool sound are people getting with this mod? I get noise from about 600rpm through till 2000rpm and then it is quiet.

Thanks. The exhaust is std appart from smashing the cat out. I checked the pressure again with someone else watching the guage and it tops at 18.5lb but only gets there when over 4000rpm. I usually never rev it that hard so probably won't be a problem . I intend to intercool though just in case.

Hi all I'm new to the forum and have been looking at the power up options. I just had to replace my turbo. I did the EGR , butterfly mod and the swirl while fitting the new turbo (china charger). It goes great, but runs a bit high on boost 5 by 1500 10 by 2000 straight up wnen over 2000...