Yeah the engine is remaining east-west, and being an ST215 engine the intake is a proper end-feed rather than the centre-feed on the early models. In my opinion it wouldn't hurt to increase the volume a little but I'm sure it will be plenty big enough for real world power figures.
I've seen those ones and am not convinced they'll suit an ST205, like most ebay crap they probably don't even know what a 3SGTE is! There are however other ones on ebay that look ok:
Item #170403813383
They are apparently 1.6mm thick 1.75" stainless runners and ½" flange plates. Is 1.6mm considered 'thin' stainless or is that likely to be ok?
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