Do I need to upgrade ECU to fit high flow cats (2011 Series II LLT SIDI Calais V)

[mick777]

I would like to fit a full Exhaust System. I have looked at both Pacemaker and Hurricane, pacemaker don't seem to do cats for the VE SIDI. Hurricane can do headers & high flow cats but says a ECU upgrade is needed:

Hurricane Headers
Part No. HU447STM [mandrel bent]
Gaskets reuse original
Application Holden Commodore VE
Engine Alloytec V6 3.6ltr 180kw & 195kw inc SDI
Pipe Sizes
Primary Secondary Outlet
1 5/8" 00" 2 1/2"
Notes Cut & Weld
Sensor extensions required [see options below]
Hiflow cats available [see options below] welding required [HU450CAT]
Ecu Upgrade required.
Installation Tips
Lubricate threads with WD40 [ or similar] for easier removal and installation.
Reuse original gaskets
Best Mufflers the Muffler and Exhaust Parts Specialists

I want to know if this still applies to my 2011 series II LLT Calais V 210kw, and if so what would be my best option for a aftermarket ECU. Or would I be best off just getting the headers and keeping in place the standard cats and exhaust. My plans for the mods I want to carry out are:

Exhaust
OTR CAI from Mace
Tune from Mace
The new cams for SIDI from mace when they come out
and down the line the Raptor Supercharger soon to be released for the VE SIDI

Any advise would be a great help.