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Thread: catalytic converter
12-14-2008, 04:05 PM #1
my service engine light keeps kicking on saying that my cats are goin bad, or are already there. at first it was one code, but a few weeks after that came a second along with the first. i cant remember the codes, but if i have it scanned again, i will post them. i know i need to replace them, and intend on doing so, but i am not going to cut and weld, i am going to go the direct fit path. what are some suggestions to get the most performance out of this investment. i need to know stories of success, failure, pleased and displeased, expensive vs. not as expensive, brands, product variations, etc.
thanks for your input
Last edited by cascott325; 12-14-2008 at 04:06 PM. Reason: spelling2000 silverado with a 5.3l v8, shorty headers, upgraded plugs, 10 mil wires, magnaflow high flow cats, flowmaster 80 series muffler(2 in 2 out) w/ 18 inch stainless silverline tips. i have a k&n CIA. its a 4x4 z71 offroad package. Ls model.
extended cab 160k miles, truxedo low profile bed cover, diablo sport predator tuner.
reman tranny @ 130k miles
12-14-2008, 07:46 PM #2
12-14-2008, 08:01 PM #32009 Sierra 1500 SLE Ext Cab 4x4 5.3L 3.73 gears Steel Gray
20" Liquidmetal Magmas
Diablo Sport tuner
ReadyLift 2.25" leveling kit
2004 Pontiac GTO - Long Tube Headers,CAI, Magnaflow catback, Comp custom grind cam, Pedders Suspension, GMM race shifter - 392 whp
12-14-2008, 08:44 PM #4
I made the mistake once of assuming that everyone likes what I like so when a friend asked me to get a new muffler system installed on his ride I took it to my favorite muffler shop and had them install a dual exhaust with turbo mufflers. It sounded so sweet (to me). Unfortunate for me, my friend is a classical music buff and he hated it. I felt obliged to spend the money out of pocket to have the performance exhaust removed in favor of the more quiet factory system.
For my 93 burb I went with a 3" catback system using a Magnaflow and a stock cat. Sounds good to me and the top end performance feels better.
So for performance go with the high flow cats and dual exhaust.
For compromise, try a cat back system.
For a more tame sound stick with the factory specs.
As always check your local emissions regs if you want to maintain the resale value.There is no way to happiness....happiness is the way.:yipi:
High Desert SoCal
93 K1500 burb (personal) 350 AT 3" Lift 250K+
02 Honda Civic LX
Looking for a 1990's Miata for an engine swap
12-14-2008, 10:12 PM #5
i have a 2000 silverado with a 5.3l v8, shorty headers, upgraded plugs, 8.5 mil wires, factory cats, flowmaster 40 series muffler(1 in 2 out) w/ 16 inch stainless silverline tips. i think my tubing is 2.5" but i havent measured, so im not sure. i have a k&n air CIA. its a 4x4 z71 offroad package. Ls model.
extended cab 117k miles
Last edited by cascott325; 12-15-2008 at 06:27 PM.
12-15-2008, 06:30 PM #6
just bringin it back to the top.
12-16-2008, 09:40 AM #7
anyone have any ideas for me? i could really use the help.
12-16-2008, 10:36 AM #8
12-16-2008, 12:32 PM #9
12-16-2008, 04:27 PM #10
Here's my opinion: stay away from Random Technology cats. Their ceramic cores tend to come apart and rattle like crazy. It happened to me. I'm running Pacesetter cats in my GTO now and havent had any problems.
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