1/48 Pratt & Whitney R-2800 C (late) Engine - resin kit. It's not assembled and not painted.
For use with:
P-47M P-47N Thunderbolt
F4U-4 F4U-7 Corsair
Vickers Warwick ASR Mk. I/VI
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.