Toyota Land Cruiser 200 4.5L V8 twin turbo diesel King Brown dual 2.5" exhaust 

Stock dump pipes (catless version), Pacemaker King Brown 2.5" exhaust (straight center pipes, rear muffler).
The mechanic couldn't reach the nuts holding the stock dump pipes to the turbos so we left them on for now. The stock dump pipes and front pipes had no cats (2011 LC200, Euro 2)