second cat removal
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Freshman User
Joined: Jul 2012
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second cat removal
Hello, i have a 95 f150, eddie bauer, extended cab, 4x4 ,302, 285 tires. My question is this... What happens if i remove the second cat. I am trying to get a better sound from the exhaust and have been told the second cat is making that impossible. There is no o2 sensor downstream of the second cat, so I'm thinking the computer will never know its gone. Also how well this affect power. With the bigger tires its kinda sluggish off the line. Thanks
Postmaster
Joined: Oct 2009
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Removing the second cat won't hurt anything. It will give you more sound. Power will be virtually unchanged unless the old cat is partially restricted.
If running bigger tires, would should really change your gears, that will do more for you.
If running bigger tires, would should really change your gears, that will do more for you.
New User
Joined: Aug 2012
Posts: 12
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From: Calif.
If you are in Calif. you won't pass the smog check, even if it is still clean enough you will fail the visual check. Of course you could knock out all the converter substrate and it would still look OK, but this sometimes will make a funny sound from the exhaust echo in the empty convertor shell.
Depending on how much noise you want (leave the CATS alone) and remove the muffler and run a straight pipe or glass pack, this sounds pretty good.
David
Depending on how much noise you want (leave the CATS alone) and remove the muffler and run a straight pipe or glass pack, this sounds pretty good.
David
Senior User
Joined: Jan 2010
Posts: 260
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If you are in Calif. you won't pass the smog check, even if it is still clean enough you will fail the visual check. Of course you could knock out all the converter substrate and it would still look OK, but this sometimes will make a funny sound from the exhaust echo in the empty convertor shell.
Depending on how much noise you want (leave the CATS alone) and remove the muffler and run a straight pipe or glass pack, this sounds pretty good.
David
Depending on how much noise you want (leave the CATS alone) and remove the muffler and run a straight pipe or glass pack, this sounds pretty good.
David
If you really want a performance sound why not install long tube headers, no cats, x pipe and true duals? 30hp and race car sound. When it's time to pass smog install a smog legal system
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