yea, you bought the wrong lip... you probably wanted one for a 94-97 bumper, or for a JDM bumper. USDM 98-01 have the part that wraps into the grille and is very "fitted" to the bumper.
All of the below are "OEM Type-R Style" lips for the integra
94-97
<BTW Mid Engine H22 swap...
98-01
JDM integra bumper lip
somebody should probably copy these images to the first post so you guys know what your are getting into with Integra lips.