This may sound totally stupid but this is the only place I know to ask! My boyfriend has a 89or 91ish CRX with a B16A engine. Once upon a time he came across a small blue plate from Japan that was supposed to go on the engine/in the engine compartment. It was rare-ish and of course, we lost it forever. I really want to get another one of these for him but Im not entirely sure what it is! (As you can tell !) It was totally awesome and really important to him and I just want to find him another one. If you have ANY idea what Im talking about, please help me out...and if not, dont be mean .