Looks like early south fl performance to me, circa 2003 or 4.
Bitd a friend of mine had one on his 2g eclipse spyder before he eventually converted to awd and moved up to a top mount for more power and control.
I think that faded oval on the number 4 cyl runner might be their logo.
Sfp was one of the first guys to offer a somewhat tubular manifold which was a big improvement for the small aftermarket 4g63 manifold selection in 2003. Other than going to a full custom tig tubular ss manifold, to use a garrett series turbo, there was only the log manifold that a few small time guys made (and it sucked), and evo iii exhaust manis, which turned out to be better than sfp due to superior strength of casting.
Of course this was a few years before fp created their own cast exhaust manifold.