they seem to me like they wouldn't flow quite as nicely, if you have a look at the #1 pipe it comes out of the exhaust flange and almost goes straight up, whereas the ones on the TRD car slope down and outwards before they sweep over. still a nice set of pipes though.
I haven't got any info on who made them, but i have a few pictures - i'm sure i have more somewhere:
And while not the same, these are fairly similar in the whole "large diameter bend" type headers
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Ive seen both 4-1 and 4-2-1 variations.
the ones at 2.35 are sooo hot....