Yes glh, only the rearmost exhaust pipe on both sides of both engines are fed by two cylinders. Both are 12 cylinder v-12 Merlins with six on each side.
Three of these airworthy Mosquitos were restored by Avspecs at Ardmore in New Zealand, and a fourth Mosquito was in the works at Ardmore, but I don't really know the status of it at the moment.
Lucky you FooFighter! Excellent pictures!