Is anyone here very knowledgeable....

[Buck 5,000+ posts]

about vehicle exhaust systems?

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[grimreper912003 5,000+ posts]

What aspect do you want? Performance, how it works, design?

 

[Buck 5,000+ posts]

How catalytic converters work and o2 sensors.

 

[fasfocus00 5,000+ posts]

What aspect do you want? Performance, how it works, design?

x2, your question is too vague, just ask the question.

 

[Buck 5,000+ posts]

Basically I want to know the difference between my pre-cat and catalytic converter. I have 4 cats on my truck, and I'm just curious about the difference between the 2, if there is any.

 

[fasfocus00 5,000+ posts]

Basically I want to know the difference between my pre-cat and catalytic converter. I have 4 cats on my truck, and I'm just curious about the difference between the 2, if there is any.

pre-cat is just the pipe leading to a catalytic converter, some pre-cat's are built like a resonator to reduce exhaust sound levels. you have so many catalylic converters to help you pass emmisions/smog test. the difference is that a pre-cat pipe is hollow and your catalytic converter has a honey comb type material to fully burn your fuel.

 

[snoopdan 5,000+ posts]

exhaust is for pussies. straight pipe ftw....fuck you all you tree hugging ****'s.

wow i've got some pent up anger this morning.

 

[Buck 5,000+ posts]

exhaust is for pussies. straight pipe ftw....fuck you all you tree hugging ****'s.
wow i've got some pent up anger this morning.

**** you. Aren't you too old to be spending this much time on the internet?

 

[HighTQCummins 10+ year member]

What type of truck do you have? On my Tacoma there are 4 cats. 2 on the exhaust manifold, then O2 sensors, then another 2 cats at which point it squeezes from 2 pipes down to one, out through the muffler. The first 2 are responsible for most of the exhaust clean up, which is why there are O2 sensors after it. The last 2 are only used to clean up a little more w/ no sensors afterwards.

These last cats can be eliminated with no ill effects. However, if this is done, the truck will not pass CA emissions. Anywhere else though, it will pass

 

[Buck 5,000+ posts]

It's an '03 F150 4.6L

 

[snoopdan 5,000+ posts]

**** you. Aren't you too old to be spending this much time on the internet?

hell no bish, I gotz mad intertnetz skillz //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[Buck 5,000+ posts]

hell no bish, I gotz mad intertnetz skillz //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

Those are useful

//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

 

[snoopdan 5,000+ posts]

Those are useful
//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

Honestly im mindlessly bored at work about 90% of the time. I spend about half my time here and the other half on racingjunk.com //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[Buck 5,000+ posts]

Honestly im mindlessly bored at work about 90% of the time. I spend about half my time here and the other half on racingjunk.com //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

Ya I'm just ****ing with you man. I'm at school...//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[JBGabriel 10+ year member]

It's an '03 F150 4.6L

Go long tube headers and custom fab the rest of the exhaust. **** cats and use O2 simulators to trick the truck