Where can I buy high flow cats for my E38?

[Pogophil]

I need to replace the cats. I had considered straight pipes, but the cat section is bent, so that wouldn't work well. I'd like to put on some high flow cats.

Where can I get them??

[323I Junkie]

get universal replacemnt cats such as the Magnaflows and find yourself a damn fine exhaust man

[32 VALVES]

I need to replace the cats. I had considered straight pipes, but the cat section is bent, so that wouldn't work well. I'd like to put on some high flow cats.

Where can I get them??
go to Jeg.com or summitracing.com

[bmwtecandy]

ive had problems in the past with high flow cats seting the catalytic converter efficiency faults. any one in the past had any luck with aftermarket high flow stuff? I suppose you could always run o2 simulators to cure the CEL.

-Andy.

[323I Junkie]

This can be a problem...you can use chevy truck converters, they are high flow AND factory efficient

[Pogophil]

Magnaflows have a good reputation. But I think you need to weld it in, correct? There are no o2 sensor holes, and no place to bolt it on....

[323I Junkie]

I was just checking them out, they have ones with and without air tubes, with and without exhaust bungs

[BasSPoweR]

clean the inside of the pipes, no cats, it will run better. thats what i did on mine

[johngoga]

clean the inside of the pipes, no cats, it will run better. thats what i did on mine

You did that on your E38? Any problems? How long have you ran it like that? Your check engine light is probabaly on right?

Thanks,

John

[Pogophil]

i'm in illinois, so i'll have to pass emissions. can't gut the cats and still expect to pass. i'd like to be able to bolt them back on every couple of years for the test and still pass.

[BasSPoweR]

yeap, i took them out a month ago (broke the inside parts, the porcelain stuff) i didnt mess with the housing, it is still there, nobody can tell that i dont have cats on. the check engine light came on
it is much more faster than before

[BasSPoweR]

also, u can buy used ones from a junk yard the whole pipes with the cats on, and change then when ever u have to go to the emissions test.
it took me only 17 minutes to take them off the car. so u you swap them any time u want.

[Shinobi'sZ]

i'm in illinois, so i'll have to pass emissions. can't gut the cats and still expect to pass. i'd like to be able to bolt them back on every couple of years for the test and still pass.

So you just run around with your check engine light on? Do you have a reset tool or something?

[Shinobi'sZ]

This can be a problem...you can use chevy truck converters, they are high flow AND factory efficient


hmmmmmm..I have a spare mid pipe off of my C5..actually I have 2 of them. I think I will just cut them out and put them on my BMW. Great info thanks.

[immaculate]

BasSPoweR and anyone else who has de-catted,

this might be a silly question but how bad does it smell without the cats? the last time i ran a car without cats (the 355) it smelled absolutely terrible and to make life worse, i had a convertible and each time i rolled up to a stoplight i felt like gagging. i ended up getting 100cell race cats so that there would at least be SOMETHING there.

i have pondered de-catting the 7 but my fear is that it will smell just as bad. maybe that's really superficial but man, the smell is god awful.

btw Shinobi'sZ, that is an awesome vette you have there.

aaron

[slvr98 M]

I will be replacing my cats with some magnaflows. I will be selling my cats when I take them off in case someone wants to gut them and swap them with there good cats.

[BasSPoweR]

You did that on your E38? Any problems? How long have you ran it like that? Your check engine light is probabaly on right?

Thanks,

John
I have been driving the car without cats for...uhhh its been 5 months i think, yes yes and a little bit more than that.
no problems whatsoever. my check light is on yes.
but now the car is faster and better

[BasSPoweR]

BasSPoweR and anyone else who has de-catted,

this might be a silly question but how bad does it smell without the cats? the last time i ran a car without cats (the 355) it smelled absolutely terrible and to make life worse, i had a convertible and each time i rolled up to a stoplight i felt like gagging. i ended up getting 100cell race cats so that there would at least be SOMETHING there.

i have pondered de-catting the 7 but my fear is that it will smell just as bad. maybe that's really superficial but man, the smell is god awful.

btw Shinobi'sZ, that is an awesome vette you have there.

aaron

no, i dont think it smells . its pretty much the same thing

[Guam740il]

I did the same thing cleaned out the cats and car runs great but I would like to get the CEL light of it is annoying. Anybody have a fix for this?

[BMW5868]

You can buy O2 Simulators here is a site there are lots out there http://www.o2sensorsimulator.com, the magnaflow hi flow cats are great and donot set off CEL.
http://img413.imageshack.us/img413/706/img2842iz7.jpg

http://img105.imageshack.us/img105/7944/img2840jk0.jpg

[firedancer740il]

i would also like to gut my cats so what exactly do i need to do just lift the car and ????? any help would be nice i am a new BMW owner well about 7 months and i am not to familiar with any of it

[Guam740il]

Great! I would now need 2 O2 simulators. Does anybody know what color the wires are for the O2 sensor and which is signal, +, -, and heat?

Thanks

[Guam740il]

Does anybody have o2 simulators installed? what are the color codes for the
O2 sensor?

[markiemark]

I've had my magnaflow cats and mufflers on for around 2 months now with no issues. And it sounds great too!

[odgrm1]

quick question for all you 7 owners who have replaced your cats..
are they bolt on or do i need to take it to some muffler shop to have them do it?

thanks in advance.

[markiemark]

quick question for all you 7 owners who have replaced your cats..
are they bolt on or do i need to take it to some muffler shop to have them do it?

thanks in advance.
Mine were welded in! An hours work at the local muffler shop!

[fungo45]

I put on the Magnaflows, but the CEL is back on. I've never heard of O2 simulators, so I was interested in reading about them. Does anyone have these? My main goal is to be able to pass emissions here in Illinois - will this accomplish this?