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Old 09-15-2007, 06:30 PM   #1
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Default interesting ebay exhaust

http://cgi.ebay.com/ebaymotors/Mazda...spagenameZWDVW

$205 shipped...interesting. I might be willing to be a guinea pig. If it were 2.25", it'd probably be ~ equivalent to a 2.5" crushbent exhaust...but certainly better than my stock unit...might not be too bad. Especially if they accepted a lower offer, as their ad indicates they might

Thoughts?
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Old 09-15-2007, 06:46 PM   #2
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Looks just like my OBX catback. Mine's 60mm fwiw.
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Old 09-15-2007, 07:15 PM   #3
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And how do you like your OBX with a turbo?
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Old 09-15-2007, 07:30 PM   #4
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I think that's the same one that's on the m.net NA forum.... they're using the best offer and getting it for like $155 shipped or something.

If it's the same, it's 2.25" od as measured by a purchaser. I also saw some fitment problems with the tailpipe, but they were able to bend it up to fit by using a big lever.

With a turbo, cat, and resonator, you could probably remove the muffler, and have a decent, cheap exhaust that wouldn't be obnoxous.
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Old 09-15-2007, 07:48 PM   #5
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Mine's very quiet but sounds very good. Eventually I'll get a bigger exhaust with less bends, but I like it just fine for now.
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Old 09-15-2007, 07:56 PM   #6
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Quote:
Originally Posted by Atlanta93LE View Post
http://cgi.ebay.com/ebaymotors/Mazda...spagenameZWDVW

$205 shipped...interesting. I might be willing to be a guinea pig. If it were 2.25", it'd probably be ~ equivalent to a 2.5" crushbent exhaust...but certainly better than my stock unit...might not be too bad. Especially if they accepted a lower offer, as their ad indicates they might

Thoughts?
hey if you want I about about to be removing my Borla cat back. I would be willing to sell to you if you want man, that way you know there is no fitment problems.


I can't remember the size but it fits up to the stock cat.
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Old 09-15-2007, 08:02 PM   #7
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Quote:
Originally Posted by wildfire0310 View Post
hey if you want I about about to be removing my Borla cat back. I would be willing to sell to you if you want man, that way you know there is no fitment problems.


I can't remember the size but it fits up to the stock cat.
How much?
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Old 09-15-2007, 08:11 PM   #8
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Ben-if you get any exhaust, feel free to get it shipped to the shop. Might make things easier on ya, instead of having to crawl on the ground like a lizard.
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Old 09-15-2007, 09:01 PM   #9
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I've done a lot of business with performance peddler. They are really nice, and actually answer their phones/emails in a timely manner. If they sell it, I'd trust it.
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Old 09-16-2007, 05:25 AM   #10
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Quote:
Originally Posted by Ben View Post
I think that's the same one that's on the m.net NA forum.... they're using the best offer and getting it for like $155 shipped or something.
Yep, and I live all the way in CA and he took $140
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Old 09-16-2007, 12:17 PM   #11
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Yup, he accepted my offer of $140 shipped. I'll let you guys know how it works out.
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Old 09-18-2007, 09:01 PM   #12
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so.. this IS the OBX rebadged right? $140 shipped? i think i hv that much on my paypal account from selling junk on ebay...
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Old 09-18-2007, 10:35 PM   #13
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I have that exhaust. Fitment was perfect. For the money I dont think you could do any better. It was way to loud when I was na, but sounds great now.
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Old 09-18-2007, 10:57 PM   #14
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ha. those guys were my old suppliers. good people.
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Old 09-19-2007, 02:42 PM   #15
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Quote:
Originally Posted by levnubhin View Post
It was way to loud when I was na, but sounds great now.
too loud? w/ a cat on? really? anyone wanna record a sound file for us?
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Old 09-19-2007, 03:23 PM   #16
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FWIW,

a 3" system will increase your exhaust flow cross sectional area by 81% over the 2.25". The 2.25" system has a cross sectional area of 3.91761 square inches, 2.75" system will be 5.9396 sq.", and 3" is 7.069 Sq".

i will agree however, it's better than a stock exhaust.
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Old 09-19-2007, 04:07 PM   #17
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Quote:
Originally Posted by Braineack View Post
FWIW,

a 3" system will increase your exhaust flow cross sectional area by 81% over the 2.25". The 2.25" system has a cross sectional area of 3.91761 square inches, 2.75" system will be 5.9396 sq.", and 3" is 7.069 Sq".

i will agree however, it's better than a stock exhaust.
Indeed, by going with a 2.25" system I am going to have much less cross sectional area than a larger diameter. However, I am looking at performance gained over stock, with the price consideration as well.

Rule-of-thumb area losses for bend type (90 bend):
mandrel bent: 0%
squeeze bent (oem): 30%
crush bent: 50%

So, the OEM exhaust has an effective cross-section of 1.933 in^2, making the 2.25" mandrel-bent system about twice as large. The 2.25" mandrel system is even ~12% larger than a crush-bent 3" system, and about ~16% better than a squeeze-bent 2.5%.

Basically, I'll be getting the rough flow-equivalent of a local exhaust shop mild steel custom job, and for $140. I'm happy.
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Old 09-23-2007, 07:31 PM   #18
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Well, before my heater hose burst, this exhaust was pretty nice

Deeper than the stock exhaust, and definitely more free-flowing. Helped spool immensely, and actually smoothed the idle
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Old 09-23-2007, 09:25 PM   #19
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Does it sound smooth? I might buy one because mine is annoying me.
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Old 09-23-2007, 09:30 PM   #20
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I don't know how it would sound without a turbo, but it's definitely smooth, deep, and quiet with a turbo.
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