Yes he had a 14K stetsom if i remember correctly, it´s a trunk car and they are a pain in the ass to score great numbers tho, i had a Cadence C6 on my subs, i can asure you this, if i were using better subs like 3 3510´s , level 4´s or something like that, i could have reached the 150 mark without any problems, my 1510´s reached mechanical limits at 900 watts per sub so i couldn´t past the 148 mark, they did pretty nice hairtricks and everything, i also built a box for a Scion XB some months ago, 4 Cheap ass Pioneer champions with an Hifonics hfi2500D wich is barely 2000 watts, he´s at 147 dbs right now @ 48 hz, i just love 10" systems, they impress a lot of people.
One funny off topic about that setup, he has 2 subs up/2 subs forward and port side, he bass raced a 146 and i told him to open the trunk, people only could see 2 pioneer´s from the back of the car, hahaha people was like WTF???? 2 10" pioneer??? we never told them it was 4 subs hehe