Originally Posted by bmwarg
I only have JB4 ISO 25 and running map 5. I live in California and so run 91 octane pump gas. Now that the BMS backend flash is free and they have pump gas versions, do I benefit from flashing or is it better to be running JB4 only?
this should be asked in the N54 section since you have a 08!
back end flash have very good numbers, contact terry via email terry@burgertuning