replacement catalytic converter suggestions for an e36 m3

Gilbert Reynolds · **Posted:** Fri Aug 04, 2006 9:28 pm

Who has experience with replacing the stock cat on an e36 M3 with OBD II? I am looking for recomendations on after market options. Performance or free flow would be best. The car still needs to be able to l pass Wake Co emmissions testing, but it is also driven on the track.
Thanks for your help.

Gilbert

MarcusMcRae · **Posted:** Fri Aug 04, 2006 10:44 pm

Gilbert Reynolds wrote:

Who has experience with replacing the stock cat on an e36 M3 with OBD II? I am looking for recomendations on after market options. Performance or free flow would be best. The car still needs to be able to l pass Wake Co emmissions testing, but it is also driven on the track.
Thanks for your help.

Gilbert

I was curious about this also. I did some searching and have not found a high flow version. All of the offerings I found were stock replacemnet.

Wes Eargle · **Joined:** Mon Oct 27, 2003 9:47 am **Posts:** 3683

Long screwdriver, hammer, O2 cheaters wired to the O2 sensors like those found here: http://www.mileliminators.com/

My OBD-II car may or may not have all of its original catalyst material in it, but I know that it passes the plug in to the computer test, and that's all that the state needs to know. :wink:

MarcusMcRae · **Posted:** Sat Aug 05, 2006 9:37 pm

Wes Eargle wrote:

Long screwdriver, hammer, O2 cheaters wired to the O2 sensors like those found here: http://www.mileliminators.com/

My OBD-II car may or may not have all of its original catalyst material in it, but I know that it passes the plug in to the computer test, and that's all that the state needs to know. :wink:

Cheater.

Graham Jagger · **Joined:** Fri Aug 29, 2003 12:53 am **Posts:** 1718

How about Random Technology?

They don't have direct fit for BMW but hte Metal Matrix is popular.

Gilbert Reynolds · **Posted:** Sat Aug 05, 2006 11:38 pm

Thanks for the info on Random.
There website looks good and says all the right things, but do you know anyone that has adapted one of their universal cats to a BMW?
Thanks
Gilbert

Silver 97 M3 Sedan ///MPWRD

DanDurusky · **Joined:** Sun Apr 10, 2005 7:31 pm **Posts:** 686

Magnaflow makes a standard (~$85) and a Race (~$170) cat. I just looked into this recently as i plot a new exhaust.

I'm thinking about the stock headers into a Ymerge, into a Race cat, into a Magnaflow 22" long resonator into a Magnaflow muffler. So a single 3" pipe. Itd weigh nothing compared to the stock stuff, should flow very well, and would cost about $600 including shop labor to fab it up.

I have no idea what it'd sound like though..

Graham Jagger · **Joined:** Fri Aug 29, 2003 12:53 am **Posts:** 1718

Magnaflow = Loud

In my experience. But they made the nicest looking SS mufflers I had seen. Clean welds and polished very nice. Shame they also resonated so bad. YMMV.

RodneyWright · **Posted:** Mon Aug 07, 2006 12:53 pm

DanDurusky wrote:

Magnaflow makes a standard (~$85) and a Race (~$170) cat. I just looked into this recently as i plot a new exhaust.

I'm thinking about the stock headers into a Ymerge, into a Race cat, into a Magnaflow 22" long resonator into a Magnaflow muffler. So a single 3" pipe. Itd weigh nothing compared to the stock stuff, should flow very well, and would cost about $600 including shop labor to fab it up.

I have no idea what it'd sound like though..

Didn't you just spend some money on the IE exhaust? You selling that one now?

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