When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
S-10 & Blazer1982-2005
The S-10 and Blazer was arguably the most versatile and accessorizable mid-size truck and SUV on the market.
Platform: S/T-series & GMT 330
2000 S10 LS 4.3 Vortec V6 4x4...see pic below of my exhaust system as it exits the headers....can someone tell me what the circled item w/the ??? marks is called and its function? It is welded to the assy..and...can it be cut out & replaced w/a short straight pipe w/o disrupting what the O2 sensors are telling the truck's ECU/PCM/BCM?
Last edited by hogbiker; September 2nd, 2021 at 4:15 PM.
since no one ever answered this, I recently found out this is what is called a "precat", and is only found on California emissions legal built trucks(how this vehicle ended up in NE PA is beyond me)...and from what I've read, I guess its only function is to heat exhaust fumes faster in cold start conditions, thus lower'n exhaust pollution sooner...consider this thread solved/closed
August 8th, 2021, 5:55 AM
help ID'ing exhaust part
