What aftermarket cat won't trip my check engine light?

[evand]

Well. I went ahead and installed some el-cheapo ebay headers this weekend. Going to make it legal and keep a cat on. Which ones are you running and not tripping the o2 into check engine mode. I don;t want to disable my rear o2 senors at this point.

 

[REDCRAPGP]

Spark plug fouler...google it.

Or I think a bunch of guys run Magnaflow cars but some still get the code

 

[evand]

thinking any 49 state legal version
MagnaFlow Catalytic Converters - 49-STATE & CANADA Catalytic Converters For Trucks, Suv's, American Muscle, Diesel, & Sport Compact Vehicles

as opposed to what I want
415300 3" FLOWMONSTER Metallic High Flow Catalytic Converter I am sure one of these spun hi flow's are gonna trip a light

 

[evand]

Wow. Never heard of these. These look like the perfect solution. If I just barely move it using the shortest one. My computer should still work as intended. My local auto store has them. Looking like I know my weekend project. Thank you


I am ordering up the shortest barely legal cat sold now.

 

[evand]

I may try the all flow
Catalytic Converter

 

[REDCRAPGP]

Don't be surprised if it still sets a code. Most universal seems to do that especially if they're high flow.You can either tune it or or once again use the spark plug fouler trick and be done with it.

 

[stealthee]

My ZZP downpipe has a Magnaflow cat in it, IIRC. It also has a defouler built in and about 2 years after install I am still CEL free,

 

[dbextreme]

I ran a Magnaflow high flow I ordered several years ago when ZZP I think sold them. They don't now, but it never triggered a code in my GT.

 

[Bronco Boy]

Walker #54627. Installed two years ago and just passed smog test again last week.

 

[Slick2500]

I second the spark plug non fouler trick.
Not a gp but same concept applies DIY O2 Sensor Bypass / Spark Plug Non-Fouler Trick Installation (w/ pics) - Honda Civic Forum