New engine info

Well I have a 94 Integra and when I got it it had a blown motor so I took it to a shop and they dropped in a new engine and the engine code is - B18A1 - I just wanted to know some info about it and if I buy engine parts for a 90-93 integra or still a 94-01 integra. For example I want to buy some DC 4-1 headers, would I buy 94-01 or what.
Thanks
Dru