try to avoid hi-to-lo stuff la if can. my experince with tht stuff not good at all. will produce hissing sound. unless u change to very very expensive hi-to-lo maybe will no thave this problem la
im using evo3 engine and after a while "tarik"(got boost 0.6bar)....suddenly i saw there is no boost increase as the needle jjust stayed 0 at my boost meter...i step hard the padel and the is no boost on all the...