I have searching this site for a picture of what catalytic converter I should have for my 2nd gen 1500 5.2 ltr i am new to these forums so still trying to navigate where to find out things? please somebody help me this truck has been modified when I bought it I'm trying to get it to pass smog I'm not sure how many 02 sensors or how many cats I should have? I don't want to make any costly mistakes. Thanks in advance for any info.

 

Google can help.

 

They changed over the years, what year is yours?

 

Guess I need to get out more, I've only ever ran into the 2 in 1 out, with 1 upstream and 1 downstream sensor.

 

In later years, it was single in/out, California has some differences from everyone else over the years as well.

 

The (HD) heavy duty version also had duel cats. I think they were just the 5.9's.

 

Those had to be really rare, as I have yet to see one.

 

I was thinking the same thing, but I never handled any 3/4+ trucks with gassers, they were all diesels.

I Don't remember seeing dual cats until the 4.7, but I don't think my 5.7 hemi trucks even have dual cats

 

My 2001 1500 5.9 HD and CA emissions. 4 O2 sensors, 2 on each end at the first cat, upstream and downstream. The second single big one has no sensors. It is a 2 into 1 going into the big cat.
https://www.hottexhaust.com/magnaflo...-eo-d-193-103/

Driver side, hard to see upstream O2 sensor

The big Cat

Passenger side upstream and downstream O2 sensors

2 into 1


2 into 1

2 into 1

 

Any options to make them sound good? dang they about shouldn't need a muffler