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      07-13-2015, 03:22 PM   #23
tiltmode43
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Quote:
Originally Posted by UntzUntzUntz View Post
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
They have it listed on their site but I have a feeling they're meaning to take it down, I got a similar response when I spoke to them. At this point, they told me their S1 don't have o2 sensor bungs in them. According to Status Gruppe, the o2 sensors on Z4M are different when compared to the E46 M3.

In either case, hoping the CPI solution is a fix and worrying about smog (other than visual) will be a worry of the past
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      07-13-2015, 03:38 PM   #24
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The OBD2 smog-legal cats CPI uses have passed on every E46 M3 that's gone through emissions. From a pricing point, $769 is too low for the SG to use the same cats IMHO. The cats alone are almost $500, plus there are laser-cut flanges, piping, bending, welding materials, labor, shipping, and R&D costs which must be made up... So, I'm optimistic in that I don't think they are the same cats and will pass smog.
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      07-14-2015, 05:10 PM   #25
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Originally Posted by pokeybritches View Post
I should have some news on CPI smog-legal cats in the next month!
I will anxiously be waiting for that update
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      07-27-2015, 07:31 PM   #26
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If this ever move forward, you can count me in.
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      08-18-2015, 04:28 PM   #27
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Originally Posted by pokeybritches View Post
I should have some news on CPI smog-legal cats in the next month!
Any updates, it has been about a month?

Trying to decide if I want to hold off on my tune if this is actually going to happen.

Thank you!!
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      08-18-2015, 06:45 PM   #28
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Yes! We test fit the prototype cats on my Z4M a couple weeks ago. Since then we've made some adjustments, and they should be sent out to California for smog testing shortly.

The cats use a higher concentration of precious metals, and they run the full length of the attachment. Space is tight. Above the stock heat shield is the driveshaft, so there's not room to bend the heat shield upwards for the O2 sensors.

CPI has been creative with the positioning of the O2 sensors. It has required some labor on their part to get everything to fit, including capping the pre-drilled hole for the O2 bung, drilling a new one further downstream, and rewelding it at a different angle.

Here's a picture of the prototype prior to the most recent adjustments. This is a prototype built to test function; the production model will be cleaner.
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      08-18-2015, 06:47 PM   #29
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Here's the last picture, since one uploaded twice.
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      08-19-2015, 11:35 AM   #30
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Exciting news!! Waiting for the final results
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      09-04-2015, 03:23 PM   #31
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Quote:
Originally Posted by Hedward View Post
If this ever move forward, you can count me in.
Quote:
Originally Posted by pokeybritches View Post
Yes! We test fit the prototype cats on my Z4M a couple weeks ago. Since then we've made some adjustments, and they should be sent out to California for smog testing shortly.

The cats use a higher concentration of precious metals, and they run the full length of the attachment. Space is tight. Above the stock heat shield is the driveshaft, so there's not room to bend the heat shield upwards for the O2 sensors.

CPI has been creative with the positioning of the O2 sensors. It has required some labor on their part to get everything to fit, including capping the pre-drilled hole for the O2 bung, drilling a new one further downstream, and rewelding it at a different angle.

Here's a picture of the prototype prior to the most recent adjustments. This is a prototype built to test function; the production model will be cleaner.
Quote:
Originally Posted by NWMcoupe View Post
Exciting news!! Waiting for the final results
UPDATE:

The cats are now in-hand over here in Cali! They will be installed on a Z4M running Gruppe-M intake, CPI Headers, and either OE or Rogue Diablo exhaust with OEM tune (SES is currently lit due to aftertmarket headers). Once installed, the car will have a standard CA smog sniffer test performed and recorded, so we can show exactly how low the CO2, O2, HC (PPM), and CO actually measure with these cats installed.

I took a look at these and the honey-comb inside looks sufficient, if these don't keep the CEL off and keep the car legitimately clean, I don't know what will!
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      09-09-2015, 10:01 PM   #32
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Quote:
Originally Posted by tiltmode43 View Post
UPDATE:

The cats are now in-hand over here in Cali! They will be installed on a Z4M running Gruppe-M intake, CPI Headers, and either OE or Rogue Diablo exhaust with OEM tune (SES is currently lit due to aftertmarket headers). Once installed, the car will have a standard CA smog sniffer test performed and recorded, so we can show exactly how low the CO2, O2, HC (PPM), and CO actually measure with these cats installed.

I took a look at these and the honey-comb inside looks sufficient, if these don't keep the CEL off and keep the car legitimately clean, I don't know what will!
Very excited to see your next update! I hate the smog laws here, but I also spent the weekend driving highway 1 so can't really complain I guess :P
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      09-28-2015, 07:54 PM   #33
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Quote:
Originally Posted by tiltmode43 View Post
UPDATE:

The cats are now in-hand over here in Cali! They will be installed on a Z4M running Gruppe-M intake, CPI Headers, and either OE or Rogue Diablo exhaust with OEM tune (SES is currently lit due to aftertmarket headers). Once installed, the car will have a standard CA smog sniffer test performed and recorded, so we can show exactly how low the CO2, O2, HC (PPM), and CO actually measure with these cats installed.

I took a look at these and the honey-comb inside looks sufficient, if these don't keep the CEL off and keep the car legitimately clean, I don't know what will!

Any news??
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      02-05-2017, 06:20 PM   #34
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Raising this thread from the dead, any update on what happened with this?
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      02-06-2017, 12:51 AM   #35
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I got shipped off overseas and had to leave the project. With DKF not producing any more s-pipes, I think the interest has passed.
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