And if there is any real core trend in LMH/LMDh engines, it's re-using homework from an existing racing project. BMW and Genesis are V-8s made of existing turbo 4s, Ferrari's V-6 has stuff in common with the 296 GT3, Porsche's V-8 is basically 25 years old, Acura's V-6 was a scrapped IndyCar engine.