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, res delete x pipe, pype bomb axleback, zl1 fuel pump, adm fpcm, id850 injectors, aem meth kit, zr1 map, zl1 rockers, slp chin splitter, 20x8.5 20x10 black asa gt5 rims, 305 nitto 555R. 600rwhp mustang dyno