Nah, RedlineRacer is right.
It's very, very unlikely that a cop is going to ask to see what you've got under your hood, and even if they do, how in the hell are they going to know that an SR20DET is "illegal"? After all, it DOES say Nissan on it, so who's to say that isn't the engine that originally came with the car? The only cop that's going to recognize an SR20DET for what it is is going to be an enthusiast, and will probably give you a thumbs-up anyway.
You all are over-analyzing this one. Most people, including cops, are NOT like us. MOST people do not debate things like the RB26DETT vs. the 2JZ-GTE or the Kouki vs. the Zenki. In fact, MOST people think that's all just a bit strange. We're "special".
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