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clogged cats

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Old 12-21-2007, 01:25 PM
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Default clogged cats

i have a stock 2003 gmc seirra, and it hasn't been running right. i took it in and they said the cats are clogged so i told them not to fix it cause i have replaced y pipes on my camaro and h pipes on my mustang. i was wondering, would it be best to order a new y pipe or just order new cats. and what sponsor would have the best prices, i checked through them but couldn't find any y pipes for stock exhaust manifolds
Old 12-21-2007, 01:34 PM
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sounds like a good time to upgrade to longtubes and a ypipe.
Old 12-21-2007, 01:47 PM
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wish i could, but all my money is going towards the camaro and motocross. plus i need this truck as just a stock daily driver that is gunna be dependable
Old 12-21-2007, 01:50 PM
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Cheapest route would be to just empty the cats. Then you would need a tune to disable the ses light for the rear O2 sensors.
Old 12-21-2007, 02:01 PM
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we thought of that, but my mustang had an off road h pipe and it always had a gassy smell, and we are not sure if we want the smell, we found a couple stock replacements for $310. does this sound like a good deal?
Old 12-21-2007, 02:03 PM
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Originally Posted by willyd465
we thought of that, but my mustang had an off road h pipe and it always had a gassy smell, and we are not sure if we want the smell, we found a couple stock replacements for $310. does this sound like a good deal?
Or you could just buy the $500 longtubes and ory for a little bit more.

And no that doesn't sound cheap. Get some high flow magnaflows cats. I have a set I'll sell ya for $100 shipped.
Old 12-21-2007, 02:10 PM
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are they straight weld in replacements???
Old 12-21-2007, 02:16 PM
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Originally Posted by willyd465
are they straight weld in replacements???
Yup, used, but in great condition. I had them put on my truck after I experienced the same problem you had.
Old 12-21-2007, 02:39 PM
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i'll check with my dad, its his truck and im just tryin to help him out
Old 12-21-2007, 05:44 PM
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summit racing sells a bolt on y pipe for under $200 shipped.


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