p/n for OEM JDM DP?
Hey Folks,
Trying to order a factory jdm downpipe, just wanted to check the latest p/n. I have N3A7-40-500A, but wasn't sure if it was superseded and didn't have much luck searching around. Anyone gotten one new recently? Thanks |
I also see this one listed as the “280hp” version: N3G140500B
Nengun has your part number priced, not sure where youre ordering from. https://www.nengun.com/oem/parts/MTE...N5c3RlbSAobXQp |
the N3A7-40-500A is the 265ps version, N3G1-40-500B is the 280ps version. 280ps is slightly larger in diameter
they both are available, price is close, i'd go with the 280ps version |
I ordered the old p/n from Nengun some weeks ago, but no tracking info yet. Hence me checking contingencies. Anyone other avenues to buy?
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You could try rhdjapan. Though I ordered a few coolant hoses through nengun and they came in reasonable time. Have you contacted them for an update?
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Originally Posted by AE_Racer
(Post 12346229)
You could try rhdjapan. Though I ordered a few coolant hoses through nengun and they came in reasonable time. Have you contacted them for an update?
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I didn't know the 280hp one was different. It didn't even occur to me. I got mine used, and I presume its the 265ps one.
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Is the diameter difference from 265 to 280 hp known?
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I seem to remember that Mazda increased the downpipe diameter on the 99 280ps downpipe, that was in the literature when they were talking about all the changes - better IC ducting, abradable seals on the compressor housing, etc.
I think the difference is pretty small, like millimeters. Any aftermarket downpipe would outflow it by a large margin. I can see the appeal of having the stock part especially in areas like Cali where it could be inspected. Dale |
From https://robrobinette.com/sae_article.htm
In the exhaust system, the front tube gauge has been reduced by 0.5 to 1.0 mm (0.02 to 0.04 in.) so that flow passage is increased while retaining the tube's outer diameter. The main silencer has also been redesigned. These changes result in about a 10% reduction - about 13kPa (1.9 psi) - in exhaust gas resistance.Dale |
Originally Posted by DaleClark
(Post 12346316)
I can see the appeal of having the stock part especially in areas like Cali where it could be inspected.
Dale |
Originally Posted by DaleClark
(Post 12346319)
From https://robrobinette.com/sae_article.htm
In the exhaust system, the front tube gauge has been reduced by 0.5 to 1.0 mm (0.02 to 0.04 in.) so that flow passage is increased while retaining the tube's outer diameter. The main silencer has also been redesigned. These changes result in about a 10% reduction - about 13kPa (1.9 psi) - in exhaust gas resistance.Dale |
Originally Posted by DaleClark
(Post 12346316)
I can see the appeal of having the stock part especially in areas like Cali where it could be inspected.
Dale |
Originally Posted by Narfle
(Post 12346253)
They have been responsive, we just don't have results yet. It is apparently some holdup on the parts supplier side, which I assume is Mazda.
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Originally Posted by j9fd3s
(Post 12346320)
the HKS downpipe is nice in CA, its pretty OEM looking
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Originally Posted by jza80
(Post 12346579)
I heard that the HKS DP has attachments for the upper heat shielding from the OEM DP?
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Originally Posted by Narfle
(Post 12346552)
Got a tracking number. I wish they had been more candid about the process, but they did kindly write me back on all queries in good time. Maybe just an eastern/western business thing. I'll be interested to see if the new or old part shows up.
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That's what I would expect. Sometimes when parts are superseded you might order the old p/n and end up with the new one. That might explain the order latency also. Probably just wishful thinking. We'll see.
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Post some pics when it gets here, I'm interested to see how a brand new one looks.
Dale |
Originally Posted by DaleClark
(Post 12346614)
Post some pics when it gets here, I'm interested to see how a brand new one looks.
Dale |
Originally Posted by Narfle
(Post 12346588)
That's what I would expect. Sometimes when parts are superseded you might order the old p/n and end up with the new one. That might explain the order latency also. Probably just wishful thinking. We'll see.
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As ordered. Thanks, Nengun.
https://cimg4.ibsrv.net/gimg/www.rx7...5fc8073e5d.jpg Gonna check the availability of the 280hp piece, too. |
New is so nice. What is the inside diameter of the pipe?
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Wow that is pretty!
Dale |
Originally Posted by Mazderati
(Post 12347040)
New is so nice. What is the inside diameter of the pipe?
I thought it would be cool to cast a US style DP head to hook up to 3" pipe, so you'd get HKS stud fitment with US style flow and aesthetics. With rapid prototyping etc, it's probably not unrealistic to do a "small" cast run. |
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