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Does anyone have of of these or seen them in person?
I tried to find one about 5 years ago with no luck. Would be nice to have a stock appearing option.
I've thrown away a few of them, there are two different styles on the 98-05 and the others on the mkiv supra/sc but they don't make any difference in power from each other. The IS300 style is alot more compact and is likely one small part of where the loss of 10hp comes from in the IS.
That first pic you posted is a 98 mkiv vvti/SC300 vvti since it has the clutch fan, and the second set of pics is an AWD jzs147 subframe that has had a vvti 2j swap.
Not sure what you are asking here? "Does anyone have of of these or seen them in person?"
Like I mentioned, yeah I've seen, removed, and trashed both styles that came on the 98-05 GS (there wasn't just a JDM S300 vs USDM GS300 counterpart, the two styles where used on GS and Aristo in both regions). I assume that your looking for these headers since your in cali with strict exhaust regulations. But either style doesn't make any difference in power, if performance is your goal I would get aftermarket headers and add either oem or 50state carb aftermarket cats to them. That's only way your going gain any discernible power.
If you're looking to purchase a used one, I would PM some of the recent GTE swapped members and see if they happen the style your looking for and still have it laying in the garage since they weren't JDM GE specific.
There's some engines on ebay that have them. You can maybe get down to the which years browsing the engine listings..
When looking at random pics you can get an idea of what the engine may have came out of since IS/GS/Aristo are front sump pan, and SC/Supra/Soarer are rear sump pan.
Here's three styles shown in current ebay engine auctions.