This one takes the cake for sure... 12" dual stacks...
05 SIERRA ECSB LLY
Suncoast Gmax V Transmission w/1058 Converter and Deep Pan
4" Stainless Turbo Back, Turndown
Daystar Torsion Keys, 2" blocks out back
Autometer Ultra Lite Pyro and Boost in Trippin Mount
EGR Blocked, QS2 on 135