Hi Guys, I searched Hi and Lo to find the differences between the JDM 8 MR and the similar fq models, what I concluded from finding is the the JDM MR is 276 BHP as limited by the manufacturer, if the car has an upgraded exhaust and airfilter could I upgrade the fuel and timing maps to the EDM MR FQ 300 or 320, using the tephra 5.10 modded rom before I get the wideband installed and tuned.

Correct me if i am wrong in any findings.

use 96260009 tephra rom and tune from the stock map.not much point using the 300 or 320 rom.