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Old 06-11-2018, 05:06 PM   #1
PowderBlueWagon
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Default exhaust system 1980 240

Hello, I am replacing the exhaust system on my 1980 240 wagon. I live in California and
need to ensure that it will pass emissions. Any advice on where to buy parts and what type of
catalytic converter to get to be California legal would be greatly appreciated!!
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Old 06-11-2018, 05:12 PM   #2
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MagnaFlow 447204 universal cat. I got mine for $70 a while ago. It's Cali CARB compliant, 2" in and out, has a 5 year/50k mile warranty, made of stainless steel, and has decent sized cells for good flow. You will need to cut out the old and weld in the new though.
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Old 06-11-2018, 06:22 PM   #3
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^ That's not an approved cat for an '80 Volvo. It doesn't have the correct CARB EO #.

According to Magnaflow, these are the only 2 that are compliant.

https://www.magnaflow.com/products?partNumber=332812

https://www.magnaflow.com/products?partNumber=332304

IPD sells a sport exhaust kit that's essentially the 240 turbo parts with a piece of pipe to connect it to the cat. The parts can be purchased separately from other online suppliers for less but then you have to make your own connecting pipe.

https://www.ipdusa.com/products/5608...n-turbo-models

Last edited by hiperfauto; 06-11-2018 at 06:36 PM..
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Old 06-11-2018, 07:27 PM   #4
dl242gt
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If you don't mind waiting for shipping from overseas. Skandix sells a Simons Sport exhaust system that is very well made and has a nice flow increase without noise. Goes over the axle instead of the restricting bend below the axle.
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1993 245 Classic, 420k miles, enem V15. IPD bars and chassis braces. Simons sport exhaust from Scandix. sbabbs ezk chip. Been a good road warrior. Genuine Volvo rebuilt leaky M47.
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Old 06-11-2018, 10:22 PM   #5
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Quote:
Originally Posted by hiperfauto View Post
^ That's not an approved cat for an '80 Volvo. It doesn't have the correct CARB EO #.

According to Magnaflow, these are the only 2 that are compliant.

https://www.magnaflow.com/products?partNumber=332304

https://www.ipdusa.com/products/5608...n-turbo-models
So what happens if a cat with the wrong eo is installed?
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Old 06-11-2018, 10:40 PM   #6
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The smog tech fails you during the visual inspection.
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Old 06-11-2018, 10:45 PM   #7
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Does it affect performance or health of the car? I'm going to have to talk with my exhaust guy.
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Old 06-11-2018, 11:20 PM   #8
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The reason California insists on the correct EO # on the cat is that the wrong size cats were being installed by exhaust shops and they were either too big and didn't get up to temp or too small and didn't last costing the consumer more than it should and polluting the environment. I doubt it will hurt your car but the smog tech won't let it fly if he sees it and they're supposed to check.
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Old 06-11-2018, 11:32 PM   #9
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Quote:
Originally Posted by hiperfauto View Post
The reason California insists on the correct EO # on the cat is that the wrong size cats were being installed by exhaust shops and they were either too big and didn't get up to temp or too small and didn't last costing the consumer more than it should and polluting the environment. I doubt it will hurt your car but the smog tech won't let it fly if he sees it and they're supposed to check.
So technically, I might still be okay until next year when I'll have to smog it and possibly replace the cat. The new cat looked almost identical to the one that disintegrated, unless the internal sizing is different.
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Old 06-11-2018, 11:39 PM   #10
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Actually, it's 2" shorter according to the info I found.
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Old 06-11-2018, 11:46 PM   #11
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Quote:
Originally Posted by hiperfauto View Post
Actually, it's 2" shorter according to the info I found.
The 447204 is the same size as the one that was already in the car. The old one broke apart a month ago, but was still functional enough to pass the smog check perfectly back in November 2017.
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Old 06-12-2018, 12:08 AM   #12
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And that's the problem. The physical size is not what matters. One core design may be more or less efficient than another so just changing the converter for one of a similar size may not be optimal. That's not to say it won't function, it just may not last as long or work as well as one of the correct size.
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Old 06-12-2018, 12:11 AM   #13
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The most affordable online direct fit converters I've bought were Magnaflow on Summit Racing. Of course mine were 49 state but they probably have a fair deal for the country of Ca.
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Old 06-12-2018, 12:45 AM   #14
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Great! Thanks for the info everyone! I'm going with the IPD performance kit and the Magnaflow Direct-Fit Catalytic Converters - CARB.
Just put in the order, hopefully get the parts before the weekend. I'll post again on how it goes.
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Old 12-15-2018, 11:57 PM   #15
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Late response here, had a few ignition and fuel system issues I had to sort out. Just got the wagon smogged, all CA legal! If I were to buy another 240 I would probably get one that is already smogged in this state, some strict regulations here, but happy I got it through! Thanks again for all the advice!
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Old 12-16-2018, 12:13 AM   #16
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One other thing. When I replaced the downpipe from the exhaust manifold it didn't have the 2" piping port that connects the ducting to the air intake box. Right now I just have that old pice of ducting hanging out next to the manifold unattached. Can I just delete this entire piece and cap off the air intake box somehow?
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Old 12-16-2018, 06:57 AM   #17
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Not in cali fix it
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Old 12-16-2018, 01:22 PM   #18
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Figures
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Old 12-16-2018, 01:31 PM   #19
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Quote:
Originally Posted by freevolvos View Post
Not in cali fix it


Go to Pick n Pull and find an exhaust manifold heat shield.
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Quote:
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Folks on here don't know a good deal when they see it.
how psi stock cna support?

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