There was an OEM lip for the sedan, only in Japan.
Only lip I ever considered for the sedan bumper was the Mugen or WW.
Wound up with the CTR. All other aftermarket lips, no matter what style (CTR, "Mugen"), looked and fit like ass.
That's why I went hatchback/coupe.
A coupe/hatch lip will not fit on the sedan lip, as I tried. Seibon's doesn't look bad, have to see it on the bumper.