I have searched already for an answer to this question and didn't find anything. I am doing a JDM H22 into a 93 HB and I want to make it CARB legal in California. I spoke to the Ref in my area over the phone yesterday and he said as long as I have the USDM Intake manifold, Throttle Body and ECU, as well as the other smog related components, that I should be fine. My question is, are there any differences between the JDM H22 intake manifold, and the USDM H22 intake manifold, and if so what are they. Also, I tried to find a CARB legal aftermarket intake manifold for the H22 and can't seem to find one. Thanks for the help!