What is this part?
#4
vadatara2, FYI: The engine is upstream of the converter, then comes the muffler and then there can be a resonator. My 1999 only has the catalytic converter and the muffler.
Does this picture posted by G0LFADD1CT help?
Does this picture posted by G0LFADD1CT help?
#5
Pre-cat. Removing it without consequences, not likely. What makes you ask?
The emissions requirements of the newer trucks dictated the need for a pre-cat. If you live somewhere that does actual tail-pipe emissions testing, you likely will not pass without it. If you live in a visual and/or plug-in inspection locale, then you would probably be ok without it provided you still had the main catalytic converter.
Image from
The stock pre-cat looks a bit different, but just putting this here for illustration purposes.
The emissions requirements of the newer trucks dictated the need for a pre-cat. If you live somewhere that does actual tail-pipe emissions testing, you likely will not pass without it. If you live in a visual and/or plug-in inspection locale, then you would probably be ok without it provided you still had the main catalytic converter.
Image from
The stock pre-cat looks a bit different, but just putting this here for illustration purposes.
Last edited by swartlkk; 10-19-2018 at 07:09 PM. Reason: Adding picture.
#6
The pre cat is what I was looking for. It has exhaust leaks at both ends and the only way I can find to repair it is to purchase the entire system from engine to muffler for somewhere around $300.00 which I cannot afford. On to plan 2, try to weld it I guess. Thanks for the answers.
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JasonGoneFishing
2nd Generation S-series (1995-2005) Tech
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12-25-2014 03:40 PM