Yes they are a straight replacement for your ecu that has been piggy backed, any of the Blitz,Jam,Mines units They remove fuel cut, raise rev limit etc do a search loads of info on here John
Saw 2 x cars make 200bhp at lasts years rr day on plug an play , rather than spend money on the parts an time spent getting it set up invest in plug an play but if you are then wanting to hunt more power then e manage John
You will need engine management for those figures, either e mange or plug an play ecu all depends on which one you want and how far you hope to go John