There was a lot of Cadence at that event because it was sponsered by a Schlemmer Audio, whose best line is Cadence. Sadly, no vehicle with Cadence in it hit over 142 dB in SPL, and no more than like 116 in DBSPLSO. As you can see in the pic, there was a Memphis competition van owned by Greg Zoller that stole the show, hitting 156.8 dB in either RadX1 or M6, and 128.8 dB in drive-by 4.
A couple other notable installs not pictured were:
An Excursion in M4 with 4 15 inch Audiobahn 1505Q's and two P.A. 2250 D's. I think it did a 148 in its class, a 144 in Reality, and 122.5 in drive by.
A sponsered MA guy had a van reinforced with steel for 40 twelves, but here he only had two 18 inch KORE woofers and 3 or 4 MA amps. He only did something like 147.5.