It surprises me that yours comes almost 2kg lighter. @Aerie can you please shed some light here? Decat and muffler is 7+kg on my setup although it looks much slimmer/lighter than the v1 hence opted for v2.Did yours come with the valve, like the picture that shows it on your bench? Mine didn't. This is what mine looked like, which was supposed to be V2 (V1 had a different valve mount setup). Mine as you see it in the picture below, weighed 11 lbs 14.6 oz, which converts to 5.05 kg. The muffler body on yours definitely looks different.
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It came with same like you the place for the valve controller which has been removed from stock to the aerie one. The only problem I faced was the spring did not fit in between the controller and the flap so my garage had to expand the spring to make it work.