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Old 11-15-2017, 06:02 AM   #1
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Default 90 NA header pipe flange size???

Looking to make a new exhaust and want it to bolt on to the header pipe.
So I can swap exhausts, if need be, canít find and at the local pull a part as they Debo the cats and flanges before they hit the yard

Thanks for any info or links.
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Old 11-15-2017, 06:23 AM   #2
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I used the eBay 740 turbo exhaust on my na. Just had to put an adapter to the header pipe. No cat. Don’t need it in SC
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Old 11-15-2017, 07:01 AM   #3
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What size adapter? Or did you cut the flange off the header pipe and weld a new one on?
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Old 11-15-2017, 01:46 PM   #4
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I used an adapter from O’Reilly. Then I ended up welding it. I don’t remember what size I used. What fuel system do you have? May need a o2 bung if your o2 is in the converter
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Old 11-15-2017, 07:07 PM   #5
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Itís a lh2.4 car, I run an lh 2.2 exhaust manifold that has the 02 located in the back side of it.
So you found a 3 bolt flange that worked at the oriellys? Well I guss I just need to pull it apart and measure
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Old 11-15-2017, 07:35 PM   #6
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No I just cut the three bolt flange and used band clamps to attach the adapter. I’m also running an A cam. I like the sound and have had complements from people on it. I’m running the maximizer system. Very pleased with it. If you need help installing it you can pm me.
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