Question about my Headers
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Instructor
Joined: Feb 2009
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From: Woodstock IL
Question about my Headers
I bought a set of used TPIS Long Tube headers a week ago. Seeing as how the headers dont have Air or EGR plumbing. I am going to delete the cats. Because of this do I need to get a tune?
Race Director
Joined: Aug 2006
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From: D / FW
If you have to pass emissions you better sell them.
Sell them anyway or you will have to put in O2 sensor bungs in your pipes or it will be missing a necessary input to control the fuel / air mix.
The cats you can live without but not the O2 sensors.
You can likely find someone to put bung plugs in the headers before you put them on.
I run TPIS long tubes and they are really good pieces !
Sell them anyway or you will have to put in O2 sensor bungs in your pipes or it will be missing a necessary input to control the fuel / air mix.
The cats you can live without but not the O2 sensors.
You can likely find someone to put bung plugs in the headers before you put them on.
I run TPIS long tubes and they are really good pieces !
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From: Overland Park Kansas
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Thread Starter
Instructor
Joined: Feb 2009
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From: Woodstock IL
The headers already come with the o2 bung welded in the right spot. I was deleting the cats because I dont have to worry about emissions. This is because my car is older than 95. Also I wanted to get a little more throaty exhaust tone without the cats.
Pro
Joined: Dec 2009
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I have headers and cats and had the headers witout cats, the sound difference is so little. Only time there is any audible difference is at full throttle and having cats is good for the environment.
What kind of cats do you have on the car?
You want to make it sound meaner, replace the resonator w/an X pipe.
What kind of cats do you have on the car?
You want to make it sound meaner, replace the resonator w/an X pipe.
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From: Overland Park Kansas
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Keep in mind that cats muffle in addition to converting exhaust fumes. Given the choice between deleting mufflers and deleting cats, choose the mufflers. Or, remove the resonator. If you dump everything, that summabeach is gonna be LOUD. Cats serve 2-3 purposes, mufflers only one. Try cats alone first. If you delete cats (vs mufflers), you should worry about emissions more -- cause you'll be emitting more (noxious) fumes. Just because you don't "worry" about fumes doesn't mean they go away. Between mufflers and cats, do you think cats restrict way more than mufflers? Wrong.
Also, the removal of cats is way more significant than the EGR/AIR issue.
Consider flow, sound, and function before you proceed.
Team Owner
Joined: Dec 2007
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A weld in o2 bung is $20, or you can get the collector for $20 built in like I did from jegs or summit. you might need a heated o2 not sure.
Either way no check, then use them, get straight pipes, and be done with it.
Either way no check, then use them, get straight pipes, and be done with it.
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