VECTOR, specializes in the production of highly detailed resin replacement engines.
The RVHP CSR-110 Albatross, is a very good kit, but the engines supplied are too simplified.
The correct engines for the CSR-110 are Wright Cyclone R 1820G (late) engines, and Vector has mastered all of the fine detail, capturing them in resin.
Each engine is sold as an individual item, NOT A SET OF TWO, so you will need to order two for the CSR-110.