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, FSP cam, Tsp 2" longtubes, ZL1 fuel pump, Adm fpcm, Id850s, Aem meth, Mcleod rxt, ZL1 3.73 diff, BMR suspension, 17" weld rts, 4.5" M&H skinnies, 305 MT ET street R. 650rwhp mustang dyno. 10.93@125 1.6 60'-before cam. 4L80 swap in progress