Quick question

[adsm08]

My experiece with 2.9s is that if the cats are not damaged the engine will run better and get better mileage if the cats are in place. The heads and exhaust piping are designed to flow at their best with the cats in place, not to mention the Federal felony aspect of removing them.

Basically, there is nothing to be gained unless they are plugged up.

 

[Broncojumper87]

Mods please lock my question has been answered and this has turned into a rather annoying pissing contest thanks.

 

[wildbill23c]

My experiece with 2.9s is that if the cats are not damaged the engine will run better and get better mileage if the cats are in place. The heads and exhaust piping are designed to flow at their best with the cats in place, not to mention the Federal felony aspect of removing them.

Basically, there is nothing to be gained unless they are plugged up.

Do you know if there are different cats available other than just standard ones or all of them the same regardless for these older vehicles? I'm working on putting my bronco 2 back together this spring and haven't really been able to find anything other than stock which are quite expensive.

 

[wildbill23c]

I just found a new "Universal" Cat for $68 from walker exhaust. Does this sound like a good deal?

 

[kody28540]

Car removed

I had my cat removed from my 1990 ranger a while back it is illegal for a company or exhaust shop to cut it off but I don't think it's illegal to actually have it off but u could say u did it yourself as long as u didn't have to get inspected I'm from Tennessee but I live in jacksonville I have Tennessee plates so no inspection for me. Taking my cat off gave me a little more power and mad my truck a little louder I've never seen anyone actually have trouble with vehicle with there cat being cut off as long as there aren't o2 sensors on or after it my o2 was before so it didn't conflict

 

[PetesPonies]

I have bought universal cats before. YOu can definitely save a lot of money in some cases. I bought a cat, welded an O2 bung and created what Dodge and others were selling for $400, for less than $100.

 

[wildbill23c]

I have bought universal cats before. YOu can definitely save a lot of money in some cases. I bought a cat, welded an O2 bung and created what Dodge and others were selling for $400, for less than $100.

My Bronco 2 is an 84 so the O2 sensor is before the cat and isn't even hooked up but right now the cat on my bronco 2 is well not even there, goes from the headers to a 2' section of pipe then to a muffler and then a 1 foot section of pipe so my exhaust outlet is right under the passenger seat. Going to get it back to the factory location here as soon as I can. Muffler shop told me they wouldn't need to install a cat because of the non-emission requirements where I live but I'm going to have one put on anyways shop quoted me $195 for a complete exhaust from the headers back without a cat, but said if I got a cat they wouldn't charge anymore for the install, so I figure why not do it right the first time.

 

[4.0B2]

My Bronco 2 is an 84 so the O2 sensor is before the cat and isn't even hooked up but right now the cat on my bronco 2 is well not even there, goes from the headers to a 2' section of pipe then to a muffler and then a 1 foot section of pipe so my exhaust outlet is right under the passenger seat. Going to get it back to the factory location here as soon as I can. Muffler shop told me they wouldn't need to install a cat because of the non-emission requirements where I live but I'm going to have one put on anyways shop quoted me $195 for a complete exhaust from the headers back without a cat, but said if I got a cat they wouldn't charge anymore for the install, so I figure why not do it right the first time.

yeah a lot of places are like that... but if you dig down you'll see it's a federal law. Emissions in your area or not doesn't matter. Most shops that know that won't touch them unless they are putting a cat on. I know a local shop wouldn't even redo part of my exhaust and redo my tips if they didn't add a cat....

 

[wildbill23c]

Looking into the universal cat makes so much more sense than the $140-180 ones the shops are selling. Below is the link describing in detail the laws of catalytic converters and also includes you cannot install a dual exhaust system in replacement of a single pipe exhaust either, so those of you who have installed such a dual exhaust on a vehicle that didn't come standard with it, also if violating federal law. (Question #7 Page 4 of PDF).

http://www.epa.gov/compliance/enforcement/air/documents/fuelwaivers/exhsysrepair.pdf