1/72 Pratt & Whitney R-2800 C (late) Engine - resin kit. It's not assembled and not painted.
For use with:
P-47B P-47C P-47D Thunderbolt
P-61 Black Widow
TBY-2 Sea Wolf
Vector Resin kits are made in Moscow from modern casting resins and are arguably some of the best scale model engines and resin detail available in the world today in both accuracy and manufacturing quality.