I had to cut some off the ends because the Accord bumpers extend further back. The bends of the bumper isn't EXACT to the 4th gen Prelude but if it's flexible you can make it work.
I have a stock Accord front and rear lip on mine by the way. Really easy mod.. maybe took an hour to do. I used a hack saw to cut the lips to size. I need to take them back off and paint them though. I am overall happy with it though! Picked them up at a local junk yard for $3