The number before the last letter, is the year of the car. If you have a non-vtec car (hx, dx, lx) you have a d17a1 engine. The d17a2 engine is for the vtec ex model civic. The em2 is the chasis code for the civic. All civics, except si/sir, is a em2. I'm not sure of the chasis code for the si/sir, but I can look on a si that is here. I'll post it in a minute.
btw, si/sir is a EP3 chasis code. And a rsx is a dc5
Last edited by Green Civic; 01-02-2004 at 11:28 AM.