switching filters.. need retune??
switching filters.. need retune??
I have the bschr st 4 with the BR440 turbo and a custom tune by vishnu.
I have the bushur air filter but want the HKS mushroom filter.
DO you think it would require a new tuen since it will flow more air?
I have the bushur air filter but want the HKS mushroom filter.
DO you think it would require a new tuen since it will flow more air?


