Carbon Fiber Engine Cover. Prepreg Carbon Fibre Engine cover We have produced the BMW N55 engine cover in 2 variations – one version specifically for the F87 M2 and the other for all N55 engines – both made in 100% prepreg carbon fibre. The M2 version uses the metal M Power strip from the OEM engine cover and the other version uses an OEM BMW roundell badge. *By request/order.