There are two types of gaskets when Wills rings are fitted, the actual hollow rings between the cylinder bore and the cylinder head with its groove machined in it and the outer paper gasket that stops water leakage from the block edge.
The rings in front of the blue gasket are the Wills rings, those under the gasket are 998cc piston rings.
Note, Wills rings can not be used on the Imps 875cc liners, they will crush the top alloy casting with the steel liner underneath.
Roy
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