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The sports spoiler does look like it may fit the non sport models but I cannot be certain. The sport spoiler seems to be a plastic component which is attached to the smaller metal spoiler which is part of the tailgate. The attached photo was taken in my garage so is not very clear but you can see the two parts referred to above.The Honda accessory catalogue does list a spoiler for non sport models at £335 fitted inc vat but it is not clear if this is the same part that is fitted to the sport model.
There are three screws visible but I think that these only retain the black plastic trim under the main spoiler. I am reluctant to do any dismantling but I imagine that the spoiler is attached to the tailgate with approx four screws.