They aren’t mentioned in any install notes. What are they?
These fit between the new engine plate and the Centa bellhousing (the part on the old mounts held in by 3 x socket head bolts each side). Your see when you take the old mounts off.
I don’t see the same with my kit, however there are two smaller rubber bumpers in the first photo that I think may replace them and are a change from the original kit
Correct - the ones in the bag are the same just in the mounted image they have been squashed - I personally do not normally fit this one as its more important to have clearance on the rear cylinder but as every chassis is different its a bit trial and error as to whether you need it.