I have finally decided to give up on my Sti UK Hatch and go down the JDM Hawk route, so my Cosworth ECPro ECU is surplus to requirements. It comes with the connecting cable and a software CD. It is essentially a Pectel SQ6M unit running PiCalTool software. Initially designed for the USDM 2008-2010 Sti, but the UK one has the same pin out, so it is plug and play. It accepts internal and external wideband, has anti-lag options etc.
They were 3500 USD new (plus shipping and taxes for the UK) and as far as I know they are not available to purchase new anymore.
I would like to get £1000 for it, but I am open to offers.

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