[sksc1105]

Hi there, I always see people talking about a 335i with JB3 map# or JB4 map# meth.

I roughly know JB is a box which can make more bhp easily but whats the different between jb3 jb4 meth?

Could those things run in a total stock 335? without any modd.

[merchomini]

jb3 and jb4 can run in a stock car, nice power gains from it to, the tune comes with different maps for you to select from depending on mods, and how much boost you want to run, jb4 meth requires a meth kit im assuming.

Jb3 comes with a number of maps starting at 1 - stock, and upward, i only run up to map 3 on mine stock, and once i get more mods ill hopefully get up to 6 or 7.

if ur stock, and thinking about it, then do it, way more fun, smoother

[J02 335i]

JB4 is just the latest version, you do not have to run meth, everything else above is true.