Following on from this thread...

http://www.vectra-c.com/forum/showthread.php?t=131113

Here is the final graph for my Stage III-

Modifications:-

New Insignia VXR Turbo
New Larger Water Radiator
New 3" Exhaust Decat Downpipe
New Iridium Spark Plugs Regapped
Standard Main Exhaust Catalyst Removed (straight through pipe)
K&N Air Filter

(Standard InterCooler & Standard Fuel Injectors)

328.57 BHP
412.20 lbft