Hey thanks for the reply...so your brother recently passed within the last year with the zzp PCM upgrade and full top swap? He didn't even switch back to stock PCM first? That's crazy because I figured I'd fail for sure if I tried to get a smog with the zzp pcm still installed..as for the Cai I'd switch that back to stock before even trying. It's just the tune and there new computer tests or whatever seeing that I've had a tune before ya know