Thats news to me...but if it's true, then that's good for us. Before I read what you posted I thougth all engine mods had to be CARB (California Air Resource Board) approved. (I grew up in California, even though I live in Las Vegas now.)
Rossi ... which tech .. a Nissan tech or a SMOG tech??
My only experience w/this is w/my z31 .. fortunately (or unfortunately) I've had to go to a Test Only place the past 5 inspections ... I only changed to the CARB legal K&N FIPK just prior to last years inspection. I had the CARB sticker (just in case) .. and passed w/o incident.
IF the 57 is CA legal .. then I'll probably just go for that .. I already have the K&N recharger kit, etc ...
I was just wondering if there are any other CA "legal" systems out there??