No, EGR blocker is a total different thing. You have to get a turner or with mine which is a 04.5 I was able to run my truck without the cat for a month or so and then the code stayed off but during that month+ it was on and off.
an EGR blocker plate physically blocks the EGR off from the intake; it won't control codes. You can actually shut off the egr function in the tune, but some people think that at high boost there's still a chance of it being forced open.
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