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Header Flang Size !!

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Old Dec 26, 2007 | 08:19 PM
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Default Header Flang Size !!

I was about to order my header flanges and the shop asked about the size, I thought all of 243 based casting are the same but the shop told me they are different. I’m planning to get either AFR or ETP 225. So now I was wondering if anyone knows which one of these flanges would work better for those heads. (I tried calling the shops but they are closed till Jan 1st) I wanted to go with 1.88” round but I thought better ask here first.

1) 1.75” Round
2) 1.88” Round
3) 2.00” Round
4) 1.63” Oval
5) 1.75” Oval
6) 1.88” Oval
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Old Dec 26, 2007 | 08:59 PM
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1 7/8 is 1.88. 1 7/8 is not as common as 1.750 so thats were I would lean more so for cost. 2" would probally be cheaper than either of the two but will take up a lot of room. I am pretty sure that the 1.750 could support over 750 rwhp.
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Old Dec 26, 2007 | 10:39 PM
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Thanks, what is the port size on 243 heads? I did some search and they say some of the ET heads have 2" port, is this true ??
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