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YOUR RESEARCHAnother 996 Cat Problem
Leading reported evidence
Replace on their end
Suggestion or failed attempt
No successful repair reported for this finding.
0
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0
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1
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Read evidence and context
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Suggestion
I would still bitch about it, so that they can issue an engineering change on their end.
Leading evidence: 'Replace on their end' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace on their end' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
The more conspicuous alternative is to find a new universal cc that is the same size pipe and cat diameter(roughly) and weld it in but preserve the original O2 bungs.,to test use the lap-joint pipe connectors.If it works, weld to look original(?)
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Suggestion
Is the cat you purchased CARB-approved for use on your vehicle?
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Suggestion
The more conspicuous alternative is to find a new universal cc that is the same size pipe and cat diameter(roughly) and weld it in but preserve the original O2 bungs.,to test use the lap-joint pipe connectors.If it works, weld to look original(?)
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My C2 996 is my daily driver and I live in California and have to pass smog. One of my Cats rattles so I need to replace it. I searched on line and bought a Magnaflow Cat. When my Indie tried to install it, he noticed it was 2 inches too short on the muffler side. The overall dimension is 30 inches which they say meets their spec. The attached picture shows the new one lined up on top of the old one. Difference is about 2 inches. Anyone else have this problem? Short of leaving the state I would appreciate any suggestions. Thank you.
Paging kromdom...he had great success with magnaflow cats.
Alternatively send them to Carnewal for a 200-cell cat internal element replacement. No more CEL.
Is the cat you purchased CARB-approved for use on your vehicle? If not, your car may still fail smog if the inspector notices that the cats have been modified.
5 years ago, I wouldn't have even mentioned this, but now that both of my "suspected polluters" have to go to STAR stations where they tend to be much more detail-oriented, I could see this actually happening...
It looks like you're pretty deep into this, but for what new catalytic converters sell for, you want to be darn sure your new cats are street-legal.
And yes, moving out of CA is starting to seem like a better and better idea. Eventually, I'm going to have to buy some "Hybrid Synergy Drive" stickers for the 996 so the environazis don't key my car.
Thanks guys. Magnaflow says that I have purchased the correct, CARB compliant, Cat for my car. I agree that modifying the Cat won't work, but I think I can add a short piece to the muffler pipe to make it work. Sure would be easier to live in another state.....so many more choices.
Magnaflow is the only aftermarket CARB approved manufacturer that sells replacement cats that are "direct fit."
https://ssl.arb.ca.gov/PartsSearchTo...earchTool.aspx
The section of tubing you have to weld on is "after" the cat, thus it remains in its intended location. I would still bitch about it, so that they can issue an engineering change on their end.
There are also longer sleeves like these (you need to find the ones with the right dimensions) that may help.
https://www.ebay.com/itm/2-X-Exhaust...xX8jKq&vxp=mtr
idk brother. I live in NJ. All I have to worry about is my CEL being off and I pass emissions. My daily has had a cracked windshield for 3 years, modified exhaust (resonator removed) and I still glide through every time.
Dont get me started on that. The amount of times I've had to clear check engine lights for gas cap codes is ridiculous. Started checking it myself every time I get gas..
OP, that sleeve that Ahsai posted may help.
Hi Gert! My 200-cell cats from you are still working fine after a few yrs with no CEL.
I was thinking the same about 997 cats and thanks for confirming. Magnaflow must have copied the 997 cats thinking they are the same as the 996 ones. Just curious, do you think the 997 mufflers will make these match and can be installed on the 996 w/o mods?
Looks like you're right Gert. According to the Magnaflow website they show the same part number for both the 996 and 997. OP should let Magnaflow (and distributor) know and return the parts.
Ahsai, thank you for the sleeve suggestion. Great solution. I'm tempted to send the Cat back to Magnaflow but it does seem that they are among the few that make direct fit for 996 that are acceptable in California.
Why don't you just buy a used OEM cat. I know it's not "legal" to sell or buy used cats.....but here are two of them in the classifieds in CA:
https://rennlist.com/forums/parts-ma...ters-3-6l.html
Here's one:
https://rennlist.com/forums/parts-ma...60k-miles.html
Here is a whole .1 exhaust in Chicago:
https://chicago.craigslist.org/chc/p...411851013.html
I could almost buy that for you and ship you the cat.
Good to hear about the cat upgrade
You could fit the 997 cat and mufflers on the later 996 .
The positon of the tail pipes will be the main problem as the ones from the 997 sit a lot further to the middle.
There is a hack for this issue that we may be forced to consider. You find a generic cat with the correct size monolithic 'brick', peel open the 996 cat tin ,insert the new brick and weld up the old tin. Easier said than done until someone finds a source of the generic brick. The welding is the easy part. You Tube has the gory details of how this is done. Yes it is Smog-illegal but so are most of the options. Regardless of the petty rules, it would probably clean up the emissions to the point where it would pass Smog. You will have done your duty to the environment even if the others are horrified.
The more conspicuous alternative is to find a new universal cc that is the same size pipe and cat diameter(roughly) and weld it in but preserve the original O2 bungs.,to test use the lap-joint pipe connectors.If it works, weld to look original(?)
https://rennlist.com/forums/996-foru...t-options.html
I have the same problem, (part number from Magnaflow 444067/444066).
Align the 3X13 screws from the cat to the manifold, Don't tighten them yet
Loosen the adjustable sleeves just enough to catch both end of the muffler and the cat. Tighten these screws (no.17) first.
Then, slowly tighten the 3X13 screws.
Just finished installing it over the weekend.
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forget about returning part to Magna Flow who sent me incorrect gaskets. I called and talked t a rep., left emails, messages. It has be three weeks now and they have not replied.
Somehow, I knew this is going to happen, and the gasket is pretty cheap anyway. So ended up order extra sets.
This is a source reference. Confirm exact model applicability in the original material.
