before i got my turbo r interior i had integra front seats. 3 out of 4 mounting points were able to work with a little pounding. the 4th i made an adapter to fit.Yeah I'm going to guess it's close to a direct fit. S2000 and Integra seats fit from what I've heard.
seriously. i havent actually owned a mk3 yet, but the stock seats in my mk2 were probably the best stock car seats i've ever encountered (even better than the seats in my dads 05 vette). i'd say just stick with the stock seats until you can get some actual racing seats... but its your car and if you really want honda seats, then by all means go for it. just expect some wtf'sWhy replace one of the best things that the MKIII has to offer...the seats!