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If they aim to get to top NA, imho best bet would be some nameless & ace combination. Runner length/merge distances (and small angle collectors with very good quality smooth meeting of tubes) like that of Ace's 350, but spacial placement closer to Nameless, to avoid need for separate overpipe which will make production costlier & may bring rubbing issues.
Next thing to try (don't know if it's possible fitment wise at all) - runners as long as Ace's 350 AND cat.
Another idea - some Y collector (for 4-2-1 design), that can be sliding/moved/mounted closer or further from end of header, to 'tune' with same header for different hp/torque/rpms optimisation within same header. (think of ace's 350/250/150, but within one header). Might be costly though.
And if they manage to make one that perform among best, many would love free OTS OFT tune or at least like PTuning does, - provides upon request for customers tuning/timing/cam tables that can be passed on to favourite tuner of choice (or DIY used by oneself with OFT).
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