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You're tapping into the exhaust, so you want pressure not a vacuum.You need to see at least a 1/2 PSI. With 2 PSI you'll definitely have EGR working.
Thanks for all the help by the way. What size holes are those? I have an iron worker at work so i can make one of those quick
If i did the math right that will be more restrictive then the 1.25" hole i put in mine.
Thinking about this, I think having the restriction after the cat may be the key............The restriction would keep more exhaust gas inside the cat. Having more exhaust gas may enable it to work better (and stay hotter too). If the exhaust gas is stuck inside for a longer period of time, the catalyst may get a chance to work for the NOX
hey guy worry about smog i got the connection it cost you more but you will pass for sure
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