I've posted this to ScoobyNet and no-one seems interested in answering. What I'm looking for is the Stock Anti-Roll bar sizes for a UK BH Legacy.
I have asked Prodrive what anti-roll bars their springs were developed with and all I can get from them is "stock". Since the work was done in England I'm betting that the "stock" they are talking about is the UK spec. I seem to recall that non-USDM Legacy's run bigger bars, and I'm trying to confirm that this is true.