Check out on their site, I'm speechless
http://juddpower.com/our-engines/judd-hk-v8-lmp2/
The engine was introduced for the 2011 season, following the ACO’s decision to mandate production based engines for the LMP2 category. We chose the BMW S65 4,0 litre V8 as our base engine (fitted to the M3 at the time) as it was available, reasonably priced and had a high specific output in roadcar form. We sourced the cylinder block and heads from our local BMW dealer and set about converting the engine for racing use. Cars fitted with the HK engine won races & championships in the LMP2 category in Europe and Asia.
http://juddpower.com/our-engines/judd-hk-v8-lmp2/
The engine was introduced for the 2011 season, following the ACO’s decision to mandate production based engines for the LMP2 category. We chose the BMW S65 4,0 litre V8 as our base engine (fitted to the M3 at the time) as it was available, reasonably priced and had a high specific output in roadcar form. We sourced the cylinder block and heads from our local BMW dealer and set about converting the engine for racing use. Cars fitted with the HK engine won races & championships in the LMP2 category in Europe and Asia.