Yeah the measurements didn't match up - so new turbo being dispatched today to me... geo is all done, and yes it will be good to get it out on the road! And Lydden!
I am having trouble sourcing a quieter back box on a 3" though. I don't want to replace centre section and back box, as it would only be swapped out on track days.
Closest I can get is a Hayward and Scott back box that reduces dB by around 4dB.. which isn't enough...
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Subaru Impreza WRX STi Prodrive Type UK 2002: 
"Tinkered With!" 
Maintained and Modified by Super Jules 
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RM Performance http://www.rmperformance.co.uk
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