Catalytic Converter (help!)

[Riggs]

ok...ive ordered the SLP loudmouth system (3 inch in/out) ...i want the magnaflow carsound cat...but im confused..i dont know if i need the 43000 series (OBDII compliant) or the standard universal series?? i have a 2001 camaro...can someone please help me out? (specifically-- explaining the difference between the OBDII cats and the universals? is there one that flows better than the other?) also...what part #'s for each cat?? thanks in advance guys, just want to get this figured out soon as i can.

use this link if needed:
http://magnaflow.com/02product/02converters.asp

[hockeyman]

Find the magnaflow website, and get the part # 940009. It's 3" in and 3" out, and fits nicely into our stock exhaust systems. All you will need to do is find a 3" to a 2 1/2" reducer so the converter will bolt up to the rest of your exhaust going back towards the muffler.
Works great, and I have yet to see a code because of the converter.

[grayman]

um,

you said at start of post something about SLP loudmouth 3in/3out... If you mean you oredered a V8 Loudmouth (3" S pipe...full 3" exhaust system ) then you will not need a 3" to 2.5" reducer.

Tell us a little more about what exactly you have ordered as far as cat back and we can tell you more specificaly what you will need.

check out this web page...
http://home.comcast.net/~grayman99/exhaust-overview.htm

[Riggs]

grayman...sorry i wasnt more precise, yes i ordered the SLP loudmouth v8 system, part #31042A - http://www.slponline.com/view_product.asp?P=31042A the system is 3 in/3 out...like i saisd i want the magnaflow carsound cat, just need to know which one to order...can you clarify for me the difference between the OBDII cats and the universals? is there a difference in performance/better flowability? will one throw a SES code whereas the other will not? also, I have a 2001 camaro...need to know if i need a cat with the 02 bung. hope this clears things up a bit...please get back to me and include part #'s when replying (converters link - in the 1st posting on this thread) THANKS!

[grayman]

Ok, the LM you ordered is for a car that came from factory with welded y pipe to cat - welded cat to S pipe and then a band clamp from S pipe to mid pipe. So, your kit will arrive minus an S pipe. It will start with a reducer on the mid pipe to change the stock v8 ID S pipe end into the 3" mid pipe.

Therefore you will need one of the installation kits. They are listed on the linked page you includeded in above post. I 'think' you will want the second one... # 30045. Confirm with them what the kit includes. You are looking for a 3" S pipe so as to mate with the cat back you bought. I don't know what the post S pipe to coverted ID mid pipe of the catback you bought will be...

I have a magnaflow/carsound 94039 3x3 with rear O2 sensor boss. I have full 3" system now and get the SES code. I plan on overiding code with HPTuners. you do not need a cat with air tube as you have an A4.

The installation kit will have a flanged S pipe...cut off the flange and your new cat will slip right over the S pipe.

double check which instalaton kits provide you with what parts. I don't think either of them come with an O2 sensor in the S pipe.

Maybe wait until you have the main catback and see what all is there before ordering parts.

If it is not too late...stop the ordeer and get a catback system for 94 v8. Those come with S pipe and stuff.

When you change to 3" system you will throw ses code no matter what cat you have. dont count on not throwing the code...it is most likely.

[ramair6]

i have the carsound cat with the rear boss and a 3" system and havent thrown a code yet . its been like 300 miles since i've had the cat too.

[Riggs]

ramair6...what part # is your car? thanks for all the help... i found the 94009 on ebay http://cgi.ebay.com/ebaymotors/ws/eB...category=33636 ... does this have an o2 bung? do i need one for my 2001 (auto) camaro? --hockeyman...u said yuo havent thrown any codes with this cat right? how long you had it on?

[hockeyman]

Originally posted by Riggs:
--hockeyman...u said yuo havent thrown any codes with this cat right? how long you had it on?

Had it on since the summer of '03. Put about 13k miles on it, and absolutely zero codes.

[ramair6]

the part number with the carsound rear o2 bung is 94039 .

[Riggs]

thanx ramair6...can anyone comfirm or deny wether the odbII cats flow equal to that of the universals? or does one flow better than the other? thanks.

[grayman]

good job on not throwing the ses codes...ya'll. I'm jealous.