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Let me ask the question again more simplified. How do you pass inspection with a catless downpipe? A tune alone won't help. It will still cause you to fail when the machine detects that the O2 sensor has been bypassed.

What? Is this your way of saying that you bribe the inspector to get the car to pass by paying them more?

How does everyone in the U.S. pass their annual state inspection with the catless downpipe installed? In the pass cars I've had, I've always only installed a high-flow cat back downpipe, so I can just install and then uninstall the tune at the same time that I get my inspection, just so I can...

Looks good.

Has anyone tried to install the Eibach lowering springs with shorter bump stops on their Supra? Wondering how it compares to the H&R springs. I've seen some pictures and it looks like there are also 2 versions of the Eibach kits that you can buy, one making it slightly lower than the other one.