Bertils USF3 engine, not really F3 spec as we know in Europe with an airbox and Airrestictor... but good for 200+ hp from a 2L
Spiess F3 Engine, this makes ``Only `` 160 Hp from 2L ... but only because there is a 24 mm air restrictor... trough which the engine need to breath.... with open induction it would deliver beyond 200 Hp ...