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How are y'all doing that..catless

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Old 02-05-2010, 11:34 AM
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Originally Posted by D_reks{5.3}
Yep Ive heard this as well, easier to just tune it out if the option too.
$5 is a lot cheaper than $200-300. And there's plenty of people that just gut the cats and leave the stock manifolds and Y pipe on there. Just throwing out options.
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Old 02-05-2010, 12:41 PM
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Just curious - how's the smell after you gut the cats? Rotten egg? Eye-watering?
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Old 02-05-2010, 12:42 PM
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smells like an old muscle car, pretty strong gas smell.
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Old 02-06-2010, 10:10 AM
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Originally Posted by Z'06
Just curious - how's the smell after you gut the cats? Rotten egg? Eye-watering?
That is what one smells like with cats and running too rich.
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Old 02-06-2010, 11:04 AM
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Removal of the cat's can also cause some exhaust systems to become raspy sounding and at the very least become louder. I ended up adding a Dynomax Bullet in each pipe in front of my muffler to kill some of the raspiness.
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Old 02-06-2010, 12:13 PM
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Originally Posted by 00ChevyScott
You can use spark plug defoulers to pull the rear O2s out of the exhaust stream enough to not throw a code.
I believe that Joe (hirdlej) may have posted pics of his spark plug defoulers on one of his work trucks....check the GM Exhaust and Performance section if you're interested...
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Old 02-06-2010, 12:16 PM
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Originally Posted by 00ChevyScott
$5 is a lot cheaper than $200-300. And there's plenty of people that just gut the cats and leave the stock manifolds and Y pipe on there. Just throwing out options.
DOH I was thinking he already had the tune, In that case the defoulers would be cheapest..
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