1/48 Pratt & Whitney R-1830-86 - resin kit. It's not assembled and not painted.
For use with:
F4F-3 F4F-4 Wildcat
CA-14 CA-19 Boomerang
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.