I recently saw an entry list program cover of 1998 Le Mans：
it shows the CLK LM has a 6000cc NA engine (A stands for atmospheric I believe), but the rest of the website shows that the CLK LM engine displacement is 4989cc
These two pages also say CLK LM has 5 liter v8 but one of them says it is designated as GT108B revised from the Sauber C9/C11's M119HL and the displacement is 4986cc：
so which one is correct? I highly doubt CLK LM used the 6L to race, maybe there was something else went on? Does anyone know about this?