Vauxhall Astra VXR
I already have a de-cat, free flowing exhaust and panel filter installed on my 182. I am going to get inlet manifold matched and cams from GDI. They advertise that as they are just fast road cams, they will work with the standard ECU as long as I get the fuelling remapped. What is the difference between remapping the standard ECU, or will it be better to get an SMT6 engine management system on this kind of setup. Any help will be appreciated.