Just no dumpvalve and probably a meshed turbo or cone filter very close to the turbo.
haha dont dig it hijack my ass loool all of us are entitled to ask question bro
If I block up my DV I get very loud chatter, sounds lovely! But then my turbo is slightly different to normal CT9s so might be different!
Also, meshing your turbo = lots of creep on the CT9 stock setup!