yes Grant, you can manage 150hp at the wheels NA and still pass smog. Alex Chang has JWT cams, ECU,Intake,exhaust and a few other goodies and just passed smog.
As far as Turbo's being high matinence. Not if they are done right and you keep your boost in the 7-11lb range they can be very easy to mantain and reliable. Matinence of them is like maintaining any other engine . i.e. belts , lines,sparkplugs ,oil,water, etc....
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