Map= manifold absolute pressure sensor. Guess the zr1 map helps with tuning. There was a debate about wether it is NEEDED but with it u can read boost througb your odb2 port. The zr1 plugs are just 1 step colder then stock which again not absolutely sure they r NEEDED. I think the sensor is about $40 and plugs $60-80.
ECS Novi 1500 supercharger, tsp 2" longtubes, zl1 fuel pump, adm fpcm, id850s, aem meth kit, 305 nitto 555R. 600rwhp mustang dyno
Waiting to install- fsp cam kit, McLeod rxt.