the fuel is mapped to 98 ron, same as the o.e.m ECU.. I know what your all saying and i agree to a point but in my opinion when it comes to b series i don't really understand why you would re-map it with just bolt ons. the gains are minimal unless you have a high comp build.. the spoon ecu is designed to work with bolt ons and cams so the map will cater for basic tuning. It changes the fuel,air,vtec and timing depending on what parts are fitted. Of course it not going to be spot on but it will be more than enough to run smooth and safe.