Yeah, for some reason it clashed with the bracket where the clutch pipe turns into a hose, you can just see it in the top left corner of the photo.
Andy (the guy that makes them) said that about 1 in 6 that he supplied this happend, evidently it was associated with bulkhead changes and other changes that just shifted the clearances a bit.
The 2a model he produces is pretty much identical except its a little more compact between the bulkhead and the turbo outlet (the first curviture down the way), that one fitted up perfectly.
You can just bend/cut the bracket for the clutch and move it out the way, but I didn't want the faff of having to make more mess in the engine bay.
I'm quite pleased with it, ok its not a super curved, air flow optimised pipe, but its better than what was on before.