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10-24-2014, 01:13 AM | #1 | |
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Any Interest in a Catted or Resonated Section 1 Alternative to DKF & Euro Section 1?
All,
After installing the Custom Performance Innovations headers and loving their product (see here -> http://www.zpost.com/forums/showthread.php?t=1048834), I noticed they offer this piece for the E46 M3: Quote:
My main point of this thread - is anyone interested? If so I'm thinking maybe we can put together a nice little GB for the product and possibly have it remain as a permanent option for the Z4M aftermarket.
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10-24-2014, 01:18 AM | #2 |
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Here's some info on the resonated version that can also be offered -> http://www.custom-performance.net/pr...t.asp?idpage=5
M3 guys love it because it kills the S54 rasp (heh, they call it "The Rasp Terminator"). Granted we have dual cats in our S1 but I still see this option as being sought after considering the price the M3 units sell for ($459 shipped).
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10-26-2014, 03:06 PM | #3 |
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Since I'm local, I emailed Jack to see if he would be interested in doing some dyno sessions with my ESS Z4M. It's got a stock exhaust now, but the seller is including Euro headers with the sale. I'd like to see a comparison between stock, Euro, and CPI headers + section 1 to see exactly what we're getting for our money.
I think the E46 M3 only has one cat in its section 1, so I'm not sure if those guys can relocate the O2 sensors like we can in the Z4M. Even if they can, with half the cylinders having a straight pipe to the muffler (no resonated X-pipe like we have), the M3 has rasp issues. We have dual cats in the section 1 and a resonator in the X-pipe, so the need to remove rasp isn't the same for us. Our motivation boils down to power and ease of secondary O2 sensor install (no welding bungs). If the CPI section 1 made a consistent 5 horsepower over stock, the it would be worth it IMHO.
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10-27-2014, 11:14 AM | #5 | |
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Spill Josh!!
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10-27-2014, 11:17 AM | #6 | |
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Quote:
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10-27-2014, 12:09 PM | #7 |
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Heh. I pick it up tomorrow
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10-27-2014, 05:53 PM | #9 | |
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Also for those who don't want cats in their section 1, I could see this being a solid option as well while keeping noise volume down. I imagine headers + CPI section resonated + x-pipe + axleback would sound great, without rasp. Let us know how it goes, Jack's a great guy!
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10-27-2014, 11:23 PM | #10 |
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I just meant the North American OEM E46M3 setup.
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10-28-2014, 08:46 AM | #11 |
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Ah, sorry I misunderstood you.
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10-28-2014, 08:57 AM | #12 |
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Heck I would install this on my 3.0si and make it work just so I can run catless headers.
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10-28-2014, 11:07 AM | #13 | |
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The header collector flanges must be fairly close to the same location.
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10-28-2014, 11:12 AM | #14 |
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Garage List E86 Z4 M [10.00]
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I just need the cats with bungs installed. I can chop off the other end and weld it into the existing piping. I'm just not sure if the flange sizes are similar.
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10-28-2014, 12:14 PM | #15 |
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I would be interested in buying them (expecting similar pricing to M3 version).
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10-28-2014, 05:01 PM | #16 |
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Certainly worth the effort of a bit of fab if we can go catless headers ,pass emissions and keep the SES away.
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07-08-2015, 04:09 PM | #18 |
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Not really enough interest, I don't think. Z4M aftermarket is tough these days it seems, especially for developing new parts.
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07-12-2015, 07:52 PM | #20 |
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I should have some news on CPI smog-legal cats in the next month!
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07-13-2015, 12:16 PM | #21 | ||
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Quote:
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Seems we *should* finally have a solid solution for DKF owners who want to be able to pass smog & not set of the SES light
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07-13-2015, 02:18 PM | #22 |
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Status Gruppe has these identical s-pipes. I contacted them a while ago and they said it won't pass smog with catless headers. Even though it says "400 Cell CA OBD2 compliant Cats" as one of the options. Weird.
http://www.statusgruppe.com/collecti...ytic-converter |
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