bnr34stepzero_Thai

Using step zero in Bangkok ,Thailland , high Boost 2.1 bar with 734 whp /830nm. On e85 with Garrett gtx 3582 ( low boost @1.5 bar ,not sure for whp) trackday (low boost) once a year for 3 yrs . Street use 3 days a week.(mostly low boost ) with no issues ,but my engineer told me last time (2 day ago )that may be this year I should consider to check everything because the engine sound is “different “ from the beginning . for me , this step zero is totally worth for money .