jeSz-iNc said:yarrr....ill be joining zero 4 very soonn huahahaa
RSM = Rev Speed MetersotplugDESIGNER said:im noob also hahaha,just give u some bely basic info
RSM if im not wrong is Review Speed Meter by Apexi,a meter that u can view ur speed,rpm,even test 0-100m/0-400m time...got so many functions...
while Defi is a brand,defi gauge just like the small round meter that u saw ppl attach on A-pilar (bside door),got few types,like rpm/bar/volt/exhaust temp bla bla
NA upgrade means upgrade without adding turbo lolx, like upgrading plug cable,intake/air filter, exhaust piping bla bla