CATS & California - Page 3 - Chevy Impala SS Forum
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post #21 of 46 (permalink) Old 08-29-2013, 04:59 PM
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I suspect your diligent paperwork, albiet you don't have the magnaFlo CATS, is what did it.

Obviously in Kings test he passed 'tailpipe" and had enough documentation for the tech to pass visual.
Very true. The car passed the sniff test with flying colors (new cats work well!) and HAVING the paperwork to back it up gave credibility for the visual. To be honest though, he barely glanced at the header/CAI documents and did not look or ask about the Cat info at all. I'm still happy I brought it, I think I could pretty easily convinced him they were Magnaflows, if needed. I doubt it will be an issue in 2 years when I go in again, as the cats will have 'aged' enough to not be shiny and suspicious...


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The rest is political revenue making BS....but if that is the game you just need to know how to play it...and win.
I had to get a bit creative here (asked a friend in AZ for a favor).

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post #22 of 46 (permalink) Old 08-29-2013, 08:05 PM
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In Calif the CARB (calif. air resource board) is the governing body with all the "rules" on what is allowed. Now with the "STAR" program in effect smog shops are under penality if they don't comply with wtf the CARB regulations are. Muffler shops can only "legally" replace a OBD2 CAT with the same size as stock (2 1/4 NOT 2 1/2" CATS).

Obviously some muffler shops will weld in whatever you bring in or buy from them but it is getting harder to find those as they face stiff fines if caught. CARB spends $ sending in decoy cars/agents to smog shops, it is such BS

so magnaFlo paid whatever $ to get a line of weld in CATS CARB certified which is why those are fing $200 each vs $60 for a Catco universal fit one.

Now pulling into a STAR smog shop with a modified motor lets say with headers and CAI (let alone it is a 383 H/C car) and the tech is 1st going to do visual and flag any non CARB certified componet on the car. The headers are screaming a issue to him and if he looks at the CATS and see's they are not in the position of stock ones AND then finds they are not OBD2 CARB labled (stamped in the heat shield) you are not going to pass big time regardless of how clean the tail pipe emission reads.

sooooo you can roll the dice and install the non CARB and in many cases get away with it....or maybe not

is there any diffrence between non CARB and CARB OBD 2 compliant CATS, other than OBD 2 having rear 02 bungs NO!, just the price tag

while I did have to watch the tech jack up my car, crawl underneath and look at the fing stamped in CARB/OBD2 marking and verify the headers were CARB compliant that is not the case on all shops. Just now the STAR program means that if a shop passes a car and it then fails 2 years later, he can get fined. Such BS but is why shops now just don't want to F with cars that are...let's say questionable on what modifications have been done regarding smog compliance.

the 96 OBD2 cars are the problem. OBD1 cars you can weld in the $60 CAT
Absolutely not true for California. ALL CATS no matter what year MUST have the CARB EO number, part number, direction of flow arrow, and manufacture date embossed into the CAT in 1/2" lettering if it's an aftermarket CAT.
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post #23 of 46 (permalink) Old 08-30-2013, 12:10 AM
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Absolutely not true for California. ALL CATS no matter what year MUST have the CARB EO number, part number, direction of flow arrow, and manufacture date embossed into the CAT in 1/2" lettering if it's an aftermarket CAT.
yes, it is required in Calif all vehicles have CARB certified replacement CATS. On 96 they need to be the "OBD2" certified also. I have the MagnaFlo CARB OBD2 CATS

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post #24 of 46 (permalink) Old 08-30-2013, 08:04 AM
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yes, it is required in Calif all vehicles have CARB certified replacement CATS. On 96 they need to be the "OBD2" certified also. I have the MagnaFlo CARB OBD2 CATS
What are you calling "OBD2 certified"? There is nothing different about an OBD1 and OBD2 CAT other than the OBD2 will have a post CAT 02 sensor.
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post #25 of 46 (permalink) Old 08-30-2013, 10:12 AM
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What are you calling "OBD2 certified"? There is nothing different about an OBD1 and OBD2 CAT other than the OBD2 will have a post CAT 02 sensor.
The magnaFlo CATS I have are stamped C.A.R.B - OBD2, NOT just CARB

I have the 441006 which are the 2 1/2" size. technically you have to install stock size of 2 1/4"

These CATS DO NOT have 02 bungs as they are just the CAT you have welded in between the two 02 locations

http://www.magnaflow.com/02catalytic...lCARB/4410.asp

they also have "pre" OBD2 CATS that are CARB for 95 and earlier years

http://www.magnaflow.com/02catalytic...alCARB/330.asp

and to add more misery to this,

http://www.magnaflow.com/02catalytic...RB/430info.asp

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post #26 of 46 (permalink) Old 09-25-2013, 06:16 PM
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I'd like to buy some new cats and am confused as to what my legal options are. I have 120k on the originals, and although I may not need to replace, I'm sure it will help the flow.

I think I'm going to drive around to a couple shops I trust and get quotes. I'm hoping to get it done for $500 or less out the door.

I've found Magnaflow cats for my 96 online for just under $400 per side and there is NO way I'm paying that.

I've seen some cats with just the cat itself, and some with the pipes going 1-2" off the cat each side with 02 bungs. Since a shop is doing it can I have them weld in new cats only or do I need to buy it with pipes on each side?

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post #27 of 46 (permalink) Old 09-25-2013, 11:31 PM
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Man do I know this well. When I bought my 96 up in Portland, Or the guy had put CIA headers with 2 prong MagnaFlow cats. Took it to a smog shop to get smogged. They actually ran it on the sniffer 1st & it passed. However, it did not pass the visual. That's where the problems started. Solution - Buy Edelbrock shorties & stock cats for a 96. Was lucky enough to sell the CIA set up to some guy in Florida so I could recoup some of my costs. A fiasco for sure, but that's the price we pay to live in the Golden State!!

96 Caprice Wagon: LT1, Black exterior with ruby red inside, Soundstream sound, rollpan, Corvette dress, LT4 valve covers, Edelbrock headers, SRI cai, Spintech 6334 muffs, Dynomax stainless tips that exit behind wheels, H-Pipe, built tranny with Corvette servos, Hipro valve body & stall convertor, 9C1 rear disc w/ SS backing plates, Wildwood 1.5" rotors w/ 4 piston calipers in front, swaybars front & rear, Metco rear links, 20" Centerline Lancers with Sumitumo 255-35-20 shoes. 1 of 485 built!!
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post #28 of 46 (permalink) Old 09-25-2013, 11:38 PM
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Are Magnaflow considered stock? Or hi flow? I hear you can buy legal hi flow cats, but everyone who says that has cats from factory lol.

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post #29 of 46 (permalink) Old 09-25-2013, 11:45 PM
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On mine they were a high-flow cat. My set up probably would have passed on an OBD1 car, but not OBD2 due to the cats having only 1 02 sensor & not 2.

96 Caprice Wagon: LT1, Black exterior with ruby red inside, Soundstream sound, rollpan, Corvette dress, LT4 valve covers, Edelbrock headers, SRI cai, Spintech 6334 muffs, Dynomax stainless tips that exit behind wheels, H-Pipe, built tranny with Corvette servos, Hipro valve body & stall convertor, 9C1 rear disc w/ SS backing plates, Wildwood 1.5" rotors w/ 4 piston calipers in front, swaybars front & rear, Metco rear links, 20" Centerline Lancers with Sumitumo 255-35-20 shoes. 1 of 485 built!!
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post #30 of 46 (permalink) Old 09-26-2013, 10:22 AM
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I'd like to buy some new cats and am confused as to what my legal options are. ?
click on the links and READ the 411 in post # 25. There are both "universal" and "bolt in" CATS avail from magnaflo for OBD2 & CARB

I have the 2 1/2" universal ones that were welded in with 02 bungs front & rear installed. This was done BEFORE the law changed which "technically" only allows same size as stock which is 2 1/4". The muffler shop that did the initial install (new owner) would not install a 2 1/2" one in now that the new laws are in effect but I suspect some other shops may not give a crap.

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Are Magnaflow considered stock? Or hi flow?

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The Magnaflo ones I have are advertised as "high flow".

the main issue with CATS in OBD2/CARB enforced states is the position of the CAT can not be 3-4" foward/back of where the stock CATS are. This is why "shorty" headers "can" be CARB certified (if that company spends the $ getting that certification).

pics of my 2 1/2" OBD2/CARB CATS that a shop welded in
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