As i used to own a subaru justy im a member on scoobynet and i go to the local welsh meets. Tonight tho i mentioned that ill be fitting a decat and manifold soon to my glanza. To which they were quite shocked that i wouldnt be getting it mapped (as i read on here that i dont need to) Most of them know their cars really well and how to get the best out of them, but they also thought it would only be a matter of time before i caused some engine damage if i add mods without it being mapped. So what im saying is, is there a limit of how far you can go before you need a aftermarket remappable ecu? Or should the car be mapped every bolt on mod i put on it? im confused. Surely a decat and manifold isnt going to effect the cars fueling to much? or am i wrong. What are your thoughts guys Ryan