Dead Cat and a Chevy Van

BobWolf · Nov 17, 2012

I have to replace a cat on the 99 chevy express van 202000 miles. Check engine light is on again. Picked up 2 universal cats just in case but my mechanic said I only need the right one. Do I need to replace both so it works right or am I OK if I just do one? Each pipe is sepparate from the exhaust manifold to the muffler so I am not too worried abbout back preasure, although with the computer and emissions will replacing only one affect performanceand milage? On the same token I dont want to replace a working cat.

Thanks.
Bob Wolf

fastman_1 · Nov 18, 2012

I would replace them both.

BobWolf · Nov 18, 2012

was thinking the same just wanted annother, opinion.

Bob Wolf.

fastman_1 · Nov 18, 2012

Why chance it if your gonna replace one wont be that much more to replace both.

BobWolf · Nov 18, 2012

I already have both anyway I figured if theyre expected to lats 80 to 100K at 202K the other one is on borrowed time anyway.
Besides, knowing my luck it will come back to bite me in a couple weeks.

Bob Wolf.

fastman_1 · Nov 18, 2012

I had a 03 GMC 2500 with a 5.3 that died at 600,+ that still had the factory cat and exhaust

asjssl · Nov 18, 2012

580,000 on 06 all original exhaust..

Sent from my Etch-A-Sketch

BobWolf · Nov 18, 2012

I have a 96 Dodge Dakota 2.5 4 cyl, stock. Melted the guts two factory cats in two years and under 20,000 miles replaced with a Walker high flow cat and this one has 14 years and no problem.

a pair of universal 2 /12 inch high flow cats will cost me abbout $225 bucks. Can I strap clamp these on or do I need them welded in? I like stainless steel band clamps they do an awsome job at sealing with most exhaust apps and wont ruin the tubing.

Bob Wolf.