i thought that mine was mapped when i just bought it to, as it felt bloody rapid ! it turns out it wasnt though, aparently some can make 210-15 bhp standard.
like said some logging will tell you if its been mapped or not, all the stage one mapped cars ive been in have a surge of power. So if you stanmp on the loud pedal about 1/3 of the way in 2nd or 3rd gear if the acceleration seems smooth chances are its oem if you feel a surge sort of on/off boost type feeling it could well of ben mapped.
