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Question about small flange on side of header tube

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Old Apr 14, 2013 | 12:28 AM
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75 Big Bumper's Avatar
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Default Question about small flange on side of header tube

Hi, I just have a simple question to ask. What is the use of the small flanges sticking out of the side of the exhaust tube on my headers? They have a sort of oval shaped flange. I can get pictures tomorrow if needed, but can anyone tell me by the description I've given?
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Old Apr 14, 2013 | 01:14 AM
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you aren't referring to the o2 sensor ports are you?
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Old Apr 14, 2013 | 01:19 AM
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No, he's talking about the "non race" versions of headers. Those ports are to reconnect your AIR system to stay "smog legal". If you buy "race versions" of the headers the ports dont even exist.

Since you have them, you need to buy block offs for them or make some put of some thin gauge aluminum.
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Old Apr 14, 2013 | 01:19 AM
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No i believe he is referring to the egr. Normally people delete this and run block off plates on their headers.
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Old Apr 14, 2013 | 02:30 PM
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Oh okay, that makes sense. Thanks for the help guys, I guess I'll just get some block offs for it. I've been told since my car is a classic I won't have to pass a smog test. Could I just cut them off and have them welded over? My driver's side header fits, but the passenger header is making contact because of that flange.
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