second cat '96 302
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Senior User
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second cat '96 302
Is there any good reason to hollow out the 2nd cat?
My truck goes to the shop for new catback exhaust in a week. Right now I have just a short piece of pipe after the 2nd cat and can see the honeycomb. It's now or never...once the exhaust is on it will probably stay that way forever. Should I take a broom handle to it or just leave it alone?
My truck goes to the shop for new catback exhaust in a week. Right now I have just a short piece of pipe after the 2nd cat and can see the honeycomb. It's now or never...once the exhaust is on it will probably stay that way forever. Should I take a broom handle to it or just leave it alone?
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Joined: Feb 2007
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From: Goose Creek SC
Reasons TO do it: Little better sound, little better performance, never having to worry about it clogging up.
Reasons NOT to: Emissions, might not pass tests and will let more of the bad stuff out.
All they are is a restriction in the system.
Good Luck
Bob
Reasons NOT to: Emissions, might not pass tests and will let more of the bad stuff out.
All they are is a restriction in the system.
Good Luck
Bob
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I'm going with no muffler, a y-pipe into duals and tips after the cats. No emissions testing here.
It sounds good now, I don't want this thing to be obnoxiously loud. How much louder would it be if the 2nd cat were hollow?
Also, is there any chance I could screw this up and get broken honeycomb lodged in there some how? Will a hollow 2nd cat effect the O2 sensor reading between the cats? (I have 3 O2 sensors on a 96)
I also don't want stinky, blue smoke rolling out the tips. Would I have this without the 2nd cat or is most of it taken out with the 1st?
Sorry for all the questions, and thanks for any opinions on this!
It sounds good now, I don't want this thing to be obnoxiously loud. How much louder would it be if the 2nd cat were hollow?
Also, is there any chance I could screw this up and get broken honeycomb lodged in there some how? Will a hollow 2nd cat effect the O2 sensor reading between the cats? (I have 3 O2 sensors on a 96)
I also don't want stinky, blue smoke rolling out the tips. Would I have this without the 2nd cat or is most of it taken out with the 1st?
Sorry for all the questions, and thanks for any opinions on this!
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Joined: Oct 2007
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From: Cheyenne, WY
Originally Posted by wildcat99
I also don't want stinky, blue smoke rolling out the tips. Would I have this without the 2nd cat or is most of it taken out with the 1st?
):If your engine's good, you won't have to worry about "stinky blue smoke".
Elder User
Joined: Oct 2007
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From: Maine
It won't smoke as long as your motor dont smoke now.And with a good muffler it will sound nice not too loud
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Senior User
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The engine's good ... I'm not putting a muffler back on. Is there any real mpg or hp gain with a gutted 2nd cat?
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