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      12-02-2014, 12:04 AM   #1
Killerfish2012
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Questions about Test Pipes- Yes, I searched

Well the mod bug has hit hard, and I'm trying to resist. Here goes

1. Is it possible to clamp back on your primary cats for emissions testing after they've been cut out? Seems like the test pipes fit over the oem piping, but was just wondering if the original piping can be lined back up, and joined with a clamp without welding. Anyone done this successfully?

2. Rear O2 spacers looks like they work on our platform, with a guy claiming 4K miles before cell thrown on a catless setup. Anyone tried this?

http://www.media6d.com/blog/russ-fel...eview-14-video
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      12-02-2014, 12:24 AM   #2
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For the normal install, the cats are cut off and the test pipes use clamps to fit to the stock x pipe. The cats would have to be welded back on if you go this route. Alternatively, you could try and get a shop to weld flanges on the stock cats, test pipes, and x pipe for a swapable solution. I doubt this would be cheap.

I'd just pay the grand for the BPM Sport Stage 2 tune and be done with it.. no CEL from test pipes and the bump in mid range torque is great. If your state doesn't do visual inspections under the car for emissions, you'll be fine from that standpoint.
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      12-02-2014, 02:40 AM   #3
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Quote:
Originally Posted by Killerfish2012 View Post
Well the mod bug has hit hard, and I'm trying to resist. Here goes

1. Is it possible to clamp back on your primary cats for emissions testing after they've been cut out? Seems like the test pipes fit over the oem piping, but was just wondering if the original piping can be lined back up, and joined with a clamp without welding. Anyone done this successfully?

2. Rear O2 spacers looks like they work on our platform, with a guy claiming 4K miles before cell thrown on a catless setup. Anyone tried this?

http://www.media6d.com/blog/russ-fel...eview-14-video
1 - not easily once its cut. Unless as mentioned, you fab. some sort of new flange so you can bolt the original cats back on.

Alt. mod one and keep a spare none mod for emissions tests. Not sure how
you guys work over there but we only do a test annually. So rest of the year you could run whatever, if you don't get caught. But we don't have road side emission tests.

Also I just had my Evolve test pipe (which is essentially the same as the vid setup) and passed the official emission annual test. Just scraped pass. That was done at a official BMW dealer. So all is good. No need to put OEM none mod exhaust back on or anything

PS. I'm not running and any remap. Despite the sensor spacer, it does come on about 4-5000 miles.
But I now have a iVini iphone app + adapter that takes like 3 mins to clear any codes. Done! (more on my channel)

Still don't a) want or feel the b) need for a remap just for the O2 sensor code. Much cheaper now to clear code IF it comes up.

Last edited by sylonien; 12-02-2014 at 02:45 AM.
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      12-02-2014, 11:19 AM   #4
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Quote:
Originally Posted by sylonien View Post
Also I just had my Evolve test pipe (which is essentially the same as the vid setup) and passed the official emission annual test. Just scraped pass. That was done at a official BMW dealer. So all is good. No need to put OEM none mod exhaust back on or anything

PS. I'm not running and any remap. Despite the sensor spacer, it does come on about 4-5000 miles.
But I now have a iVini iphone app + adapter that takes like 3 mins to clear any codes. Done! (more on my channel)

Still don't a) want or feel the b) need for a remap just for the O2 sensor code. Much cheaper now to clear code IF it comes up.
This is the route that seems to make the most sense. So no codes or Cel for 4-5K miles with the spacer? Also which spacer are you using? The fabspeed one, or another one?

Thanks!
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      12-02-2014, 10:37 PM   #5
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Mod bug got you!
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      12-03-2014, 05:35 AM   #6
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Quote:
Originally Posted by Killerfish2012 View Post
This is the route that seems to make the most sense. So no codes or Cel for 4-5K miles with the spacer? Also which spacer are you using? The fabspeed one, or another one?

Thanks!
Just found one from eBay UK.
Works pretty much the same which ever you get.
Simply extends the o2 sensor further away from the exhaust in attempt to "fool" the ECU.
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      12-03-2014, 01:57 PM   #7
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Mod bug got you!
Yep! Pretty bad, lol.
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      12-03-2014, 01:58 PM   #8
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Quote:
Originally Posted by sylonien View Post
Just found one from eBay UK.
Works pretty much the same which ever you get.
Simply extends the o2 sensor further away from the exhaust in attempt to "fool" the ECU.
Sorry to be a bother, but could you see if they will ship the item to the US, and give me a link to the item.

Thanks
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      12-06-2014, 05:31 AM   #9
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Quote:
Originally Posted by Killerfish2012 View Post
Sorry to be a bother, but could you see if they will ship the item to the US, and give me a link to the item.

Thanks
Seems like they post within Europe only.
But no harm in trying to ask them?
You need 2 x of them

http://www.ebay.co.uk/itm/Lambda-Spa...item3a849295bc
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      12-06-2014, 08:22 AM   #10
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I tried Vibrant 02 extenders with the various reducer fittings, without success, while testing a full x pipe on my 08M3. If retaining the rear cats, maybe the result would be different, but I don't know. There are some "mini cat" 02 extenders (Supersprint uses them) that may work. I would not count on positive results.
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      12-06-2014, 10:28 AM   #11
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Quote:
Originally Posted by sylonien View Post
Seems like they post within Europe only.
But no harm in trying to ask them?
You need 2 x of them

http://www.ebay.co.uk/itm/Lambda-Spa...item3a849295bc
Thank you so much I just bought some from a US ebay vendor, yesterday. What I needed to know is our sensor hole dimensions. In our case: M18x1.5mm
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      12-06-2014, 10:30 AM   #12
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Quote:
Originally Posted by pbonsalb View Post
I tried Vibrant 02 extenders with the various reducer fittings, without success, while testing a full x pipe on my 08M3. If retaining the rear cats, maybe the result would be different, but I don't know. There are some "mini cat" 02 extenders (Supersprint uses them) that may work. I would not count on positive results.
The L shaped spacers work fine for our car, as verified by: ki_daniel. I messaged him about his results with the fabspeed spacers, and they worked for him for well over 1,000miles.
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      12-06-2014, 10:36 AM   #13
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So is suspension up next?
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      12-06-2014, 10:47 AM   #14
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So is suspension up next?
I wish I had the $ . Right now I need more power, so the stock EDC is going to have to continue to kickbutt. This year struggling with modded stangs at Mid America Motorplex was no fun! Made me wish I was in my 335I on my race gas tune in those straights
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      12-06-2014, 11:01 AM   #15
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Quote:
Originally Posted by Killerfish2012 View Post
I wish I had the $ . Right now I need more power, so the stock EDC is going to have to continue to kickbutt. This year struggling with modded stangs at Mid America Motorplex was no fun! Made me wish I was in my 335I on my race gas tune in those straights
That's cool bud. Stock EDC is certainly good enough to have fun with.

You going to tune? I'm not finding Akra + delete-r quite as strong as Akra + tune. Seat of the pants and straight speeds as well I think.
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      12-06-2014, 04:53 PM   #16
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Quote:
Originally Posted by FormulaMMM View Post
You going to tune? I'm not finding Akra + delete-r quite as strong as Akra + tune. Seat of the pants and straight speeds as well I think.
I'm a cheap little bastard, so I'm not going Akra, just test pipes on oem catback. I would love a tune, but coming from a 335i where a tune netted me 150whp to a tune netting me 10whp, doesn't quite have the same appeal. They are awesome though, and I'll get around to it eventually.
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