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Old 09-19-2019, 01:31 PM   #81
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The description on the last one you posted stated it is made of T321 but then you scroll down to the pics and they say the flange and mandrel bent pipes are T304 ..........which is it ? I have cheap Ebay headers on mine made of T304 , been on the car four years and so far so good . Having said that if these headers shown below are REALLY T321 I would purchase them . But at that price I doubt they are T321 either that or they are made in a Chinese sweat shop


http://rover.ebay.com/rover/1/711-53200-19255-0/1?campid=5336391335&toolid=10001&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2FT321-STAINLESS-RACING-HEADER-MANIFOLD-EXHAUST-97-04-PORSCHE-986-BOXSTER-BASE-S%2F401774979366%3F_trkparms%3Daid%253D555018%2526 algo%253DPL.SIM%2526ao%253D1%2526asc%253D201310031 32420%2526meid%253D63bcdcdf151840079ffddab060cf509 2%2526pid%253D100005%2526rk%253D5%2526rkt%253D12%2 526sd%253D162427660994%2526itm%253D401774979366%25 26pmt%253D1%2526noa%253D0%2526pg%253D2047675%26_tr ksid%3Dp2047675.c100005.m1851
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Old 09-19-2019, 01:46 PM   #82
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The cheap ones are fine. I have used them on both my Boxsters the first time being in 2012. Current set been on this car since 2013. You can spend a tonne more money for some FVD or Cargraphic ones for not a whole lot more gain.
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Old 09-19-2019, 01:47 PM   #83
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As has been noted here previously, aftermarket eBay header fitment can be hit or miss. Some seem to fit and align perfectly, while others are off enough so as to be practically unusable. And there is no good way to predict this beforehand - you just have to roll the dice and hope that you get lucky.

Assuming that you currently are running the Euro non-cat manifolds, my personal opinion is that for most practical street-driven purposes, there is not going to be a huge performance gain to be had via the use of headers. Accordingly, if I were in your shoes, I would choose to keep things simple and would retain the OEM manifolds.

You would then end up with a system such as I posted on Page 1, Post 19 in this thread, reposted below:



And here's the finished view:

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Old 09-19-2019, 01:53 PM   #84
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Just changing the OE manifolds out for the cheap eBay ones you can feel the engine rev a little freer especially in the last 1000rpm. If they are coming off anyway then you may as well change them.
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Old 09-19-2019, 05:27 PM   #85
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Have y'all seen the new ones just released from soul performance for the 986?

Damn sexy.....
https://soulpp.com/?s=986

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Old 09-19-2019, 06:48 PM   #86
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Thanks all, I guess at this price range itīs all basically the same and as Dave80GTSi stated, they are hit or miss, so I went for the cheapest ones. Next stop trying to remove the manifold bolts..
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Old 10-01-2019, 10:51 AM   #87
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This is the setup I just purchased - thank you for the great idea
How did you do the O2 sensors? did you use the original ones and did you need extensions for the cables or did they fit as is?

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Originally Posted by Dave80GTSi View Post
Assuming that you currently are running the Euro non-cat manifolds, my personal opinion is that for most practical street-driven purposes, there is not going to be a huge performance gain to be had via the use of headers. Accordingly, if I were in your shoes, I would choose to keep things simple and would retain the OEM manifolds.

You would then end up with a system such as I posted on Page 1, Post 19 in this thread, reposted below:



And here's the finished view:


Last edited by pilot4fn; 10-01-2019 at 08:12 PM.
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Old 10-01-2019, 02:18 PM   #88
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Another inquiry about the o2 sensors. Since the stock ones are very short (US 2004 S). Did you extend them yourself?

I tried searching for o2 sensor extensions and didn't see any (surprised, since my previous Miata had them available).

I tried searching for ROW o2 sensors as I assumed they'd be longer since they don't have primary cats, but couldn't find them. Anyone ever tried ROW o2 sensors?
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Old 10-03-2019, 02:49 AM   #89
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Most of the guys I know who race 3.2+ motors use the Chinese manifolds with great success. I used a pair on my 3.4 street boxster and love them. For my 2.7 rallycross boxster I used 997 exhaust manifolds and love those too. You need some fabricating skills to make those work though. I go over the 997 manifolds in this thread. 6 months to live build thread
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Old 10-03-2019, 10:59 AM   #90
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Oxygen sensor extension info:

See my post no. 13 here: Searching for Spock with an O2 sensor

And my post no. 9 here: Headers and high flow cats

Works perfectly!
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Old 10-08-2019, 05:14 PM   #91
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Quote:
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Most of the guys I know who race 3.2+ motors use the Chinese manifolds with great success. I used a pair on my 3.4 street boxster and love them. For my 2.7 rallycross boxster I used 997 exhaust manifolds and love those too. You need some fabricating skills to make those work though. I go over the 997 manifolds in this thread. 6 months to live build thread
Wood can you post a link to the "good" headers? Does great success mean fitment and performance?
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Old 10-09-2019, 03:51 AM   #92
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Wood can you post a link to the "good" headers? Does great success mean fitment and performance?
Sorry I don't have one. I got mine secondhand but they were never used. I don't remember who made mine. They all seem to look the same and have the same fitment issues, as in the bolt holes need some tweaking to line up. The welds look pretty good for where they're made. In a street car they'll probably last a lifetime, but only last a few seasons in a race environment.
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Old 10-09-2019, 03:56 AM   #93
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pro tuning lab .com is selling headers for $131 a pair
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Old 10-09-2019, 01:16 PM   #94
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I wouldn't worry about a link. The seller supply and batch may not be the same anyway. I've had a set of the eBay ones on each of my Boxsters buying in 2012 and 2013/14 from different sellers on eBay. The cheapest price looks to be about 20% more now in the UK.
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Old 10-17-2019, 04:30 AM   #95
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Well boys, just got all parts for my new exhaust.. At least it looks sweet!
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