Shnitz wrote:but it isn't legal to put an engine in that was never legal in the US and have your car registered as a 240 (you can get it registered as offroad/race only, or as a kit car if you do heavy modification that gives you a lot of receipts which you have to present to the dmv and proves that it isnt just a modified 240)
I think you'd also have to worry about emissions laws in states like CA. Even if your car would pass a sniffer, you'd still fail the visual inspection.
Not to tread on Dead Horse Beating territory, but there's no reasonable way to have a street legal SR20DET.
Quiksilvia, I believe the part you read refers to swapping an engine from another vehicle of the same model. I *think* you can only swap in an engine that was available in that particular model of vehicle and is from the same or later model year car (in CA). So, if you own a 2003 4 cylinder Hyundai Tiburon, you could swap in the V6 from another 2003 Tiburon.
That's my understanding of the issue in CA. Anyone from CA care to elaborate and/or correct me?