I've used this group for replacement cats for the W210. Good NC company, nary an issue.
https://apemissions.com/emissions-products/#CatCon
https://apemissions.com/emissions-products/#CatCon
Aftermarket Catalytic Converters
- Thread starter Sid6.7
- Start date
To check fuel trims you buy a scanner. One of the BT based systems could probably get you going extremely inexpensively.
You don't adjust them but figure out why the ECM is if they're off. Typically vacuum leaks have it adding fuel. Something like a leaking injector has it trying to pull fuel. This is super-simple-101 but if you saw it with negative trims at or above 10 that could mean it's trying to pull excessive fuel because something is allowing unmetered fuel into the combustion chamber.
Misfire codes are also worrisome, but you'd get a flashing CEL when they're occurring (theoretically) and a constant CEL after ‐‐ but it sounds like you already have the latter, so you wouldn't necessarily know if additional codes join the party.
You'd want to be confident your pre-cat O2's are good to trust the data. But if you're not getting codes for Sensor 1 on either Bank(s), I'd say you're safe to trust it/them.
I use Torque and watch the fuel trims on #1 but voltage on #2, assuming there is a #2 and if there isn't then I'm watch the temperature on #1.
Fuel trims on the Genesis Coupe are really boring as they are generally around +-1. Voltage on the second O2 will tell you how well the cat is doing, assuming there is a cat.
My Accent the fuel trims would rise to double + digits. Ran OK. If I drove out on the Interstate at +60 mph then the trims dropped to +3 or lower. Turns out the OE fuel mapping is really lean at under 50 mph which is what most of my driving is.
Fuel trims on the Genesis Coupe are really boring as they are generally around +-1. Voltage on the second O2 will tell you how well the cat is doing, assuming there is a cat.
My Accent the fuel trims would rise to double + digits. Ran OK. If I drove out on the Interstate at +60 mph then the trims dropped to +3 or lower. Turns out the OE fuel mapping is really lean at under 50 mph which is what most of my driving is.
I've used after market complete cat back CARB compliant stainless steel I got off of E-Bay. A small shop in Jersey made them. I live in NY, same California Emissions. All bolt together. A lot cheaper than OEM, and it worked. New O2 sensors and I was good to go. The only thing that did not fit was the manifold cover. Bought some cheap fiberglass wrap off Scamazon, good as new.
I think I know that exhaust company in NJ they're on ebay. Northeast Exhaust some name like that. Bought a cat-back exhaust in 409 stainless from them, it was for my 96 Civic. Awesome quality and a complete copy of Honda's system, down to the welded brackets! There's good stuff out there from no-name places, just have to dig. So I completely agree with you!
Yep, That was them, you jogged my memory !!!!!! Thanks
Great little company. Like you said, sometimes you gotta dig I like the fact that their small business USA too !
Great little company. Like you said, sometimes you gotta dig I like the fact that their small business USA too ! 
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- Jul 10, 2022
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I was planning on answering this question. I bought a Walker FED cat for the Chevy Traverse. It was $187 when the OE is $2,100. Lots of positive reviews. It doesn’t look like OE but it doesn’t look like a joke either. Heavy but I hate those cheap crimp bends.
Every once in a while a negative review saying won’t work if your car has calif emissions (all do for the most part). Our Buick was a total loss before I could get it installed. The other risk vs OE is if it actually fits without modifications.
Every once in a while a negative review saying won’t work if your car has calif emissions (all do for the most part). Our Buick was a total loss before I could get it installed. The other risk vs OE is if it actually fits without modifications.
Pictures of the hole might be helpful.
I put 3 Walker California Carb Compliant Cats in my 13' Pilot @ 100k. A lot cheaper than OEM, and they fit like a glove. Being in NY, I can't play games with non-carb complaint Cats........ Personally, I believe that stupid " ECM" system Honda uses to shut down cylinders on the highway to save fuel had something to do with the Cats crappin out. Dumping crap into the exhaust when engaged. Bought a bypass kit and did away with that ECM nonsense. A V-6 is supposed to run on all 6 cylinders, in my eyes anyway. Didn't see a difference in gas mileage. Still drank gas like a pig anyway. Then I sold that monster not too long later. Let someone else " feed" it. LOL
Northeastern ExhaustsI think I know that exhaust company in NJ they're on ebay. Northeast Exhaust some name like that. Bought a cat-back exhaust in 409 stainless from them, it was for my 96 Civic. Awesome quality and a complete copy of Honda's system, down to the welded brackets! There's good stuff out there from no-name places, just have to dig. So I completely agree with you!
I put 3 Walker California Carb Compliant Cats in my 13' Pilot @ 100k. A lot cheaper than OEM, and they fit like a glove. Being in NY, I can't play games with non-carb complaint Cats........ Personally, I believe that stupid " ECM" system Honda uses to shut down cylinders on the highway to save fuel had something to do with the Cats crappin out. Dumping crap into the exhaust when engaged. Bought a bypass kit and did away with that ECM nonsense. A V-6 is supposed to run on all 6 cylinders, in my eyes anyway. Didn't see a difference in gas mileage. Still drank gas like a pig anyway. Then I sold that monster not too long later. Let someone else " feed" it. LOL
Deleting the VCM is very popular on those cars. 3 cats, and how many motor mounts?
I think I know that exhaust company in NJ they're on ebay. Northeast Exhaust some name like that. Bought a cat-back exhaust in 409 stainless from them, it was for my 96 Civic. Awesome quality and a complete copy of Honda's system, down to the welded brackets! There's good stuff out there from no-name places, just have to dig. So I completely agree with you!
Northeastern is awesome! I have a Northeastern exhaust on my car. It is still holding up after 2.5 years
Don't get me started. ALL THE MOTOR MOUNTS TOO !!!!!!! ( ECM/ VCM, whatever the stupid dash light said, I deleted it )....And the lower control arms compliance bushings were leaking ( but they were under warranty/ re-call ) RR shock leaking at 10k ( Also under warranty ) Not the point. Who the heck needed the aggravation ????? Back and forth to the dealer...... P.O.S. Pilot !!!!!!!!!!!! Glad it's GONE !
yup that's it!
Northeastern Exhausts are the BOMB !!!!!! Unsurpassed quality. A really good small business. Hope they stay around a long time.
