im thinking of putting a 1.6 in my focus with it only having a 1.4 in at the minute and with a full exhaust system i hoping for a 30bhp gain, but im not sure if i need an ecu from the 1.6 or will my current ecu be ok, or will a remap sort things out? ive never done this so im grateful for any info

 

Need to change ecu. Easy conversion though. Do able in 4 hours.