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As for handling the high HP: The area that is shared is taking away from the total cross sectional area of the pipes, but the actual reduction in that area is rather minor. It is taking out about 1/8th of the area available so as flow increases, there will be a restriction produced by that point. However, the MAS itself offers greater resistance than at this junction. If you take a screen off of a MAS unit and compress down the filaments, you will see that it actually takes a larger percentage of the available space away from that cross sectional area so the MAS itself becomes the restriction as these demands increase. Bottom line, there are other things of greater restriction in the intake tract before it so the difference is inconsequential. As for the turbulence from the MAS, I'm not sure how exactly to answer that. I can state that the shared area in the "X" provides for a combination of flow; an addition of the flow going into both sides of the engine. The suction the engine puts on the intake system is felt at that shared area and from there, it is equally split between both of the MAS units and filters. Any turbulence in that shared area will be equal on either side due to the symmetry of the design so there aren't any issues with that. The theory behind the shared design proved itself on the dyno with cant_z_me(OH)'s TT when the A/F did not change when we switched from the single intake and the DOOLZ. The only parameter changed was the injector "K" value to accomodate for the fact that the ECU was only seeing half of the total air intake. Any intake system, no matter how big the pipes are, will begin showing losses as the flow increases. How much the actual loss is is dependent on the amount of flow through that system. The intake on our cars is 2.5" from the filter(s) to the compressor housings which is of larger diameter than the pipes coming off the pressure side of the compressor. If one were to make the feed pipes (to the compressor) 3", there will be an increase in flow proportional to the increase in cross sectional area as long as there is not any point more restrictive than a 3" pipe. However, the MAS units themselves offer a sisgnificant restriction and putting larger pipes in there with the stock MAS units will not affect it to any measurable degree. What one could do to find if a filter is adequate or not would simply be to flow test it vs. a MAS unit. If it flows more than the MAS unit can, then its good. If not, then you need a better flowing filter.
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