i was thinking "MAX" exhausts system + downpipes some sort of filter, but as of yet still not sure of the best one & last a Remap, again not sure wheres best for BMW mapping.
Are turbo intake temps on the BMW important like they are on an N/A motor? given that turbos run intercooles to cool down the ingoing air?
If not under bonnet cone filters would then be ok right? and i could use these twin filter systems that the Americans go for?