I got this from itrca.com:

1997:

First year for production
Offered in Championship White only
A/C Optional
1998:

Integra Received Facelift (Front and Rear bumper changes)
Offered in Championship White Only
Rear Wiper added
Steering wheel has an Acura emblem embossed on the face of the airbag cover
(1997s say "ACURA" across the front)
1999:

Not offered in the United States
2000:

Color Change - Offered in Phoenix Yellow and Flamenco Black Pearl
New Shift knob - Titanium look knob
Different Intake Camshaft used more resembling the JDM Civic Type-R Intake Cam
ECU wiring and programming different
Faux carbon fiber inserts added to trim center console and vents.
Wheels were changed to Gunmetal Gray
More Responsive Steering Rack, Ratio Changed to 15.7:1 from the 97/98 16.1:1
Air Conditioning became standard equipment
2001:

Color change - Flamenco Black Pearl Discontinued and Nighthawk Black now offered.