For N54 or N55
I run it in a n54 with very good results and without any problems what so ever,
We run it at 70-75% permanently and got 219wkw at snails with it, it was about 19wkw extra as the car dynod 200wkw std, will have to check th tq tho...
Rennzport sells them on this forum, easiest power ever!