Us and euro gtr can run ron 95 but factory mapswill cut output, with cobb ap you are able tune the engine to run 95. I've got mine tuned at 1 bar stock everything 480whp and 1.2 bar 500whp however advisable to go 97 with that map.
My 350z's gearbox grinds when shifting from 6th to 5th. Any idea what is causing this? I read online that it is due to a faulty synchro. Anybody faced this problem before?