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Old Sep 26, 2007 | 06:35 PM
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Question V10 cat?

Which catalytic converters are good for the V10? All the ones I can find are for 5.9L engines and smaller. What difference does that make?
 
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Old Sep 26, 2007 | 09:53 PM
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What's wrong with the one that came with it?
 
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Old Sep 27, 2007 | 04:52 AM
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Its plugged up and I dont wanna fork over the outragous price of the oem cat. I do however want to stay legal. Im not sure but I think if its rated for a smaller engine it will still work but wont be able to hold back as much.
 
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Old Sep 27, 2007 | 11:13 AM
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Are you sure it's plugged up? That's unusual since leaded gas hasn't been around since long before these engines were made. The stock cat has a lower restriction than most aftermarket "high flow" cats.

There are some converters for 6.8's here

Or you might want to use two smaller converters, one on each bank.
 
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Old Sep 29, 2007 | 05:49 PM
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Originally Posted by big10
Which catalytic converters are good for the V10? All the ones I can find are for 5.9L engines and smaller. What difference does that make?
First off, are you in a "Sniffer Test State" such as California or any state that adopted Cali emissions? If you are the best bet would be an OE replacement or aftermarket direct repleacement.

I have a little Dynatech 3" cat on my truck. It isn't rated for displacement or anything like that. You can see through the thing very easily so I figured capacity or flow isn't really a concern for me. Local emissions for me is just a visual check, just have to have a CAT don't matter what kind. I have been running the dynatech cat for over a year with no problems.

Converter size is usually determined by displacement. More Ci = Bigger larger Capacity Cat Less Ci = Smaller less Capacity Cat.

Search for cats on Summit Racings site, you will find all different capacity converters for different cubic inch engines.
 
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Old Sep 29, 2007 | 08:15 PM
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Thanks for the tips. Im not really sure what exactly they do here but a mechanic said most cars can still pass here unless they are new and the engine light is on. This is in NY. I used to live in cali and you cant do ***** out there to any part of the vehicle.
 
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