I have toyo manifold fitted on 09 200. With power flex engine mounts. Had no issue with clearance, all be it could be down to ensuring the top mount arm fully pulled out on bulkhead bolt (the arm is slotted here) as such levering the engine forward at the top and such rotating the bottom of the engine up giving you more clearance at the subframe.
Maybe be accurate or not, but RS tuning (leeds) claim that the TOYO manifold is more of a hindrance than the standard manifold. However it seemed my bucked the trend, that could be down to the Akro.
Oh and it maybe beneficial to wrap the manifold before you put it on, aids heat management and also adds a few tenths to the bhp figure.