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Interesting find with the H22A7 exhaust (Lots of pics)

 
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Old 12-15-2016, 11:13 PM
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Interesting find with the H22A7 exhaust (Lots of pics)

I run sanctioned racing and I'm my division cars must use stock parts only. I have a prelude with the h22a. I found out (had to order from overseas from eBay) the the h22a7 accord type r header is different. Maybe not a night and day difference but I see slight gains here. I also have ordered the downpipe since the header is a few inches longer but haven't recieved it yet. Width of the JDM header Width of the UK header Vertical measurement of JDM Vertical measurement of UK Outside pipe size of JDM Outside pipe size of UK
In conclusion, I expect to see gains even though they may be minimal with .75mm wider 3.25mm taller primary. As well as the straight pipe vs the curved will give more efficient flow.

Last edited by racerguy; 12-15-2016 at 11:15 PM.
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Old 12-16-2016, 08:56 PM
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Re: Interesting find with the H22A7 exhaust (Lots of pics)

Interesting info. I hope it works out to your benefit!
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Old 12-18-2016, 02:11 PM
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Re: Interesting find with the H22A7 exhaust (Lots of pics)

Thank you. I found it interesting because the ATR stuff is so rare in the US. Not only the increase in size but the length of the primaries should also add a small advantage over the JDM header.
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Old 12-19-2016, 01:40 AM
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Re: Interesting find with the H22A7 exhaust (Lots of pics)

doesnt help much if you put it with stock 2" downpipe since S/R exhausts are 2,25"
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