PPE/Sikky Headers w/or w/out cats question
#1
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Hi, new '08 F owner in central Texas looking to get headers and JoeZ exhaust installed this year. Sorry if this question is redundant but I didn't find the answer in a thread. I want to install headers but still pass my emissions inspection. I know that adding the JoeZ exhaust will remove two of the four stock cats on the F, and as far as I can tell if I take off the stock headers it will remove the other two cats. The upgraded headers can come with or w/out cats.
My question is will only one cat on each side still pass the insp? Or for that matter will a high flow cat(one on each side) pass the insp? I'm assuming no cats will not pass insp at all. I appreciate any feedback, especially anyone that has first hand knowledge passing emissions with their F and has either of these headers installed here in Texas.
My question is will only one cat on each side still pass the insp? Or for that matter will a high flow cat(one on each side) pass the insp? I'm assuming no cats will not pass insp at all. I appreciate any feedback, especially anyone that has first hand knowledge passing emissions with their F and has either of these headers installed here in Texas.
#2
Lexus Champion
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Search and you will find. This issue has been talked about many times. In a nutshell:
It is illegal to tamper with working stock cats - PERIOD! That means all four of them. With that being said, you will probably pass the sniffer with aftermarket High Flow cats, but you would never pass the visual, if the inspector knows or cares about what he/she is doing.
And, I happen to be a PPE owner with a modified exhaust and HiFlow cats.
Lou
It is illegal to tamper with working stock cats - PERIOD! That means all four of them. With that being said, you will probably pass the sniffer with aftermarket High Flow cats, but you would never pass the visual, if the inspector knows or cares about what he/she is doing.
And, I happen to be a PPE owner with a modified exhaust and HiFlow cats.
Lou
#3
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Thanks Lou. Im inbetween Sikky and PPE, is there any drone with the PPE and high flow cats? I bought mine with a muffler delete and the drone can get annoying.
#4
Lexus Champion
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^^^^IMHO, there will be drone with a third party exhaust. See these two threads.
https://www.clublexus.com/forums/is-...emissions.html
https://www.clublexus.com/forums/is-...z-exhuast.html
It appears drone is a personal experience. I have driven in an F, with stock headers and the JoeZ exhaust and the same F with PPE, no cats and the JoeZ. Both experiences had drone, again IMHO. Other members of this forum say otherwise. That's why I say it's a personal thing![Sad](https://www.clublexus.com/forums/images/smilies/sad.gif)
My exhaust, IMHO, sounds great, produces power (though not as much as a catless JoeZ) and has absolutely no drone.
http://youtu.be/stqr-gE06TM
Lou
https://www.clublexus.com/forums/is-...emissions.html
https://www.clublexus.com/forums/is-...z-exhuast.html
It appears drone is a personal experience. I have driven in an F, with stock headers and the JoeZ exhaust and the same F with PPE, no cats and the JoeZ. Both experiences had drone, again IMHO. Other members of this forum say otherwise. That's why I say it's a personal thing
![Sad](https://www.clublexus.com/forums/images/smilies/sad.gif)
My exhaust, IMHO, sounds great, produces power (though not as much as a catless JoeZ) and has absolutely no drone.
http://youtu.be/stqr-gE06TM
Lou
Last edited by flowrider; 07-01-12 at 09:44 PM.
#5
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@sickpuppy Hey man I am currently running ppe catless headers to a full Joe Z catback and a titanium intake elbow with drop in high flow filter. I see you mentioned you are running welded in high flows .. What are your thoughts does it really tame the sound all that much. low key i love the way mine sounds but i would consider welding in high flow cats if it would clean up the engine note a little bit as well as give me a little bit more induction noise. Your feed back would be much much appreciated!
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Joe Z (03-19-22),
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#7
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Hi, new '08 F owner in central Texas looking to get headers and JoeZ exhaust installed this year. Sorry if this question is redundant but I didn't find the answer in a thread. I want to install headers but still pass my emissions inspection. I know that adding the JoeZ exhaust will remove two of the four stock cats on the F, and as far as I can tell if I take off the stock headers it will remove the other two cats. The upgraded headers can come with or w/out cats.
My question is will only one cat on each side still pass the insp? Or for that matter will a high flow cat(one on each side) pass the insp? I'm assuming no cats will not pass insp at all. I appreciate any feedback, especially anyone that has first hand knowledge passing emissions with their F and has either of these headers installed here in Texas.
My question is will only one cat on each side still pass the insp? Or for that matter will a high flow cat(one on each side) pass the insp? I'm assuming no cats will not pass insp at all. I appreciate any feedback, especially anyone that has first hand knowledge passing emissions with their F and has either of these headers installed here in Texas.
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#8
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I'm FBO + tuned and used to be stationed in Killeen. I have Magnaflow hi-flow cats that I purchased from RR Racing when I got my headers. I didn't want to smell exhaust fumes all the time. The cats help cut it down by like 70%-80%. I also replaced the pressure vents in the trunk as mine were dry rotted and the fumes were going into the cabin before. I think they are worth it. Now they sell the PPE headers with GESi cats welded to them.
The following 3 users liked this post by xdejablu3x:
#9
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@sickpuppy Hey man I am currently running ppe catless headers to a full Joe Z catback and a titanium intake elbow with drop in high flow filter. I see you mentioned you are running welded in high flows .. What are your thoughts does it really tame the sound all that much. low key i love the way mine sounds but i would consider welding in high flow cats if it would clean up the engine note a little bit as well as give me a little bit more induction noise. Your feed back would be much much appreciated!
Also, as mentioned somewhere else, replacing those vent flaps in the trunk is highly recommended - I had mine done a few months later and it was a HUGE improvement!
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