I have seen these all over the place online...

http://catalog.walkerexhaust.com/cat...dStatus=ACTIVE

I am wondering if they would really be that much of an upgrade over stock, or if I should just buy 2 converters and bring them to a shop to have them welded on.

I am 99% sure my exhaust system is the same as ou guys with the 4.7 V8's, so if you have high flow cats, which ones, and what was the spprox. cost including fabrication and everything? Thanks.

 

i call thoes the pre cats. the cat is under the passenger side you cant miss it. i replaced mine with a spintech highflow 130$ and got it installed for 70$.

 

Good info. I will crawl under the truck and have a looksie.

 

the green qc i looked at last week only had the one big cat. same engine but 2002. i was pissed mine had more emissions stuff.

 

Mine is 2004 w/ 3.7 L. I was under the truck when I installed my muffler, and I remember the pre-cats, dont remember the actual cat but I will take a look tomorrow.