2mm will make the different already. More air to go in to the air chamber and combusion room. That's why some bore it until 64 or 67mm... After market TB like Jun is 70mm at inner diameter. But bigger doesn't mean better, big enough for ur engine OK lar. Don't tell me a stock b16a is going to put a 67mm or 70mm TB.
Hi All Sifu,
i have something need to ask and know about our Airtrek subframe (front) & (rear).
Our front subframe if want to convert to EVO, version 7 to 9 is can fix, right? if only take the EVO lower arm to fix on...
I bought a second hand VAFC & comes with an installation manual. Tried to install it but unfortunately, the mec/tuners need the ECU diagram to link the VAFC with the ECU in order to control the MIVEC openings...