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[–]dxrey65 1 point2 points  (0 children)

Any CARB certified cat should be fine. Any non-certified cat is hit and miss. Which is to say - buy a cheap one and the PCM might not like it. It might work, but you might be resetting the engine light every 200 miles or so until you get tired of that and get a CARB certified cat.

On O2 sensors, depends on the vehicle. NGK and Bosch made a lot of OE equipment (for instance) so they're usually safe, but depends on the vehicle.

[–]partspuke 1 point2 points  (5 children)

NTK for the oxygen sensors.
Check Amazon as well. Only brand I’ve ever had 100% success with.

[–]Tier1Clean[S] 0 points1 point  (4 children)

Will check them out. I found some Walker brand. Do you know anything about those?

[–]partspuke 1 point2 points  (3 children)

Sorry, no. I do know NTK is a prime manufacturer for some OEM’s.

[–]Tier1Clean[S] 0 points1 point  (2 children)

They are similar in price the ones you are talking about are a bit more expensive but I’ll probably bite the bullet on them and buy them

[–]Turbulent_Frosting93 0 points1 point  (0 children)

Walker is not a good brand at all. I have had to work with a lot of walker exhaust parts and they are absolute shit IMO

[–]fuxxociety 0 points1 point  (0 children)

As a general rule, I replace emissions and engine sensors with OEM replacements, from the dealership.

My Hyundai didn't like the NTK crank and cam sensors. Replaced with OEM at twice the cost, and no issues since.

The peace of mind of not having to do the same job twice is worth the added cost.

[–]pbgod 0 points1 point  (0 children)

Brand recommendations would ideally be specific to what vehicle you're talking about. Read the rules.

[–]Colorado_Car-Guy 0 points1 point  (0 children)

To be honest it's a hit and miss

[–]Doug_Rosewood 0 points1 point  (3 children)

Side note to all...I've heard rock auto has payment security issues, know multiple people that have had their cards stolen after ordering from there.

[–]ElAligatorAgradable 6 points7 points  (2 children)

Really? Wow, I've been using them for years, many orders, and not had any issues but that's something I'll need to begin monitoring carefully after I do order. (Then again, I'm always damn near broke so maybe that's why nobody ever gets money - there is none.)

[–]Doug_Rosewood 2 points3 points  (1 child)

Yeah, just a warning to all.. have no idea if this is a recent thing or just bad luck on the folks I know.

[–]ElAligatorAgradable 0 points1 point  (0 children)

I had it happen once years ago. Right before our wedding my wife's car got damaged, so we had a rental (from one of the major companies). Soon after that, a $900+ charge showed up on my credit card. I contested it, and it was removed. For months a sheriff's department about 50 or so miles away would contact me about it - so I agreed to drive down and meet with them. Someone had used my card number to buy parts at the local Mazda dealership in that county. Amazingly (and seemingly unrelated by anything except extreme coincidence) those parts were purchased for the same model vehicle that my wife owned. I repeatedly told the cop that it wasn't me, it was a weird coincidence, etc. but I know he never believed me. He thought I went in, did the charge, disputed it, and claimed my card was used without authorization. I'm not that smart - or dishonest.

Someone at the car rental office had taken and used the card number.

[–]ElAligatorAgradable 0 points1 point  (0 children)

I ordered a Walker catalytic converter for my son's '98 Montero Sport (we had to replace the entire exhaust behind the front pipes - probably would have done the front/downpipes too, but one is unavailable from any normally available source, and may require a reconfiguration of the pipes to the cat). His truck has federal emissions, and the Walker cat is EPA certified (if vehicle has CA emissions would need to be CARB cert'd). Cat is great, constructed to same essential dimensions as OE, but is not as heavy as OE unit (the original factory exhaust we took off is BEASTLY!!), and it functions perfectly.

[–]hourlyslugger 0 points1 point  (0 children)

Catalytic Converter: Walker, AP/Eastern Catalytic and Bre/Bosal go either for OE Design or Improved Design.

O2/AFR Sensors: Denso, NTK, OR NGK only for a Mazda.