You are looking at someone’s mistake being transformed into someone’s dream. The current owner purchased this Cayman with a blown motor and wanted to swap a Chevy V8 or an Audi V8/V10. The owner decided to go with the LS3 V8. The engine is using a Kennedy Engineering LSx adapter to bolt to the factory Porsche transaxle. The owner plans to install a dry sump oiling system and Quaife sequential transmission. It will be interesting to see the performance compared to other Caymans. We will be following this build closely. Update: Completed project here
Source: Cayman RSR (build thread) via LS1Tech