This is the german article about Rebellion where they say that ByKolles have the exclusivity on the Nissan engines.
Translated from german (it also says that Rebellion could join with two cars)
Quote:
|
Nismo will continue to supply ByKolles exclusively. Gibson and Judd have corresponding engines on offer. In addition, another variant is conceivable: The British engine tuner Neil Brown offers with his company NBE the current V8 DTM engine from Audi for use in prototypes, although the unit is considered very heavy.
|
source