Seems like the AC 160 mic, this is from the build log that the OP posted about the guy who beat him -----
comp today, AC mic. i won the 3rd class with a 154.2 sealed on the dash at 44hz. then i won outlaw and my first run i maxxed out the meter and it maxed at 160 db. we saw 160.4 then it flatlinned, so they had me go agian after they adjusted somting and i pulled a 156.7 in the kick fanning drivers side door. I was loudest at show by far. closest other compediter was 149.4 and he had 2 lvl 4's 15" on a sundown 3k and that was sealled, and then on outlaw closest was like 150.6. and they all was 6" from port, there was only one other person that fanned door so i mean, noobs.
Seems like they adjusted the K-factor on the Mic, pretty sure the AC 190 goes up to 190dbs also. If its the AC160 the mic is WAY off of the TL and can be adjusted so u can get louder scores by simply tuning a knob.