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 folks, i'm going to slap on my 4G93T with nu turbo.
i've just got me a GT series A/R60 turbo. I was wondering bout how much power can i squeeze from it, any installation problems, spool time etc. Any help would...