Originally Posted by KingOfJericho
The 335is is currently listed on BMWUSA as having a twinpower turbo, the same as the N55 335i. The same is listed for the Z4 35is. I believe the N54 is already a thing of the past.
You may believe that, but it's wrong. Both of those cars have the N54, despite BMW's marketing effort to make it seem like the same engine is in all 35i cars.
If you wanted to get all of the Performance parts, this car isn't such a bad deal, but personally I would only want the power kit and exhaust on my 135i so I'd rather just get those for the 135i I already have.