finally,the 95mm ecv on my car now. this really make some different, but when it fully close, i don't think i can drive it for long time. so i only close it when i see cop:) but when it fully open the exhause noise and power just like before, full boost no problem.
i asked some mechanis about back pressure damage, they told me, the back pressure = heat, if too much back pressure = too much heat. so if the exhaust temp not that high that mean no problem. exhaust temp too high, mean need slow down. i think this make some sense.
PS: fxxk nengun, i wait 2 and half month for just a ECV!!