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Discussion Starter #1
ive been wanting to get the 5" cat but people say 4" is just about the same?!!?!?!!? what do yall think??
 

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get rid of the cat all together....

Sorry had to be the first to say it.

Put some more info into your sig. Your going to have less resistance across a 5" brick face then you would a 4". going 4 to 5" will gain you about 45% more area.
 

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USE THE FRIKKIN SEARCH BUTTON!!!

this question has been asked..what? 10 times or so..its simple dude..just click on search..and read away!

 

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Easy Pro400exc he is a new guy!

About the only difference between a 4" and a 5" is, well an 1". Unless you are running more than 600hp.

you should be fine with a 4" IMO
 

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Add a signature.......According to your garage you have an 02......if you have an 02, you dont have a cat. Anyway back to the question.........4 inch is probably adequate unless your gonna go balls out on your truck, if you know what i mean..

Joe
 

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I like the four inch stainless steel systems. In Texas it is not as big of a deal, but here in Wisconsin the aluminized does not last as long. Plus the price of 409 grade stainless is not that much more than the aluminized systems. I have not seen any five inch stainless systems yet.
 

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You will not gain any performance from a 5" system. You will notice a sound difference, and lower egt's. Thats really about it. Your turbo will spool up quicker also, especially if you run a straight piped system.
 

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You will not gain any performance from a 5" system. You will notice a sound difference, and lower egt's. Thats really about it. Your turbo will spool up quicker also, especially if you run a straight piped system.
Seems that you said there would be no performance gain and then went on to name two specific ones :D
 

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I was talking about turbo quicker spooling and lower EGTs. The sound is the thrid "performance" one you mentioned. ;)
 

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I was talking about turbo quicker spooling and lower EGTs. The sound is the thrid "performance" one you mentioned. ;)
):h I dunno, I never really thought lower egt's as a performance....but I geuss it would be. As far as quicker spooling, you should get the same amount of boost, just quicker. Right? I geuss that could be performance too......
 

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lower egt's is performance because you can turn up your chip.
 

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USE THE FRIKKIN SEARCH BUTTON!!!

this question has been asked..what? 10 times or so..its simple dude..just click on search..and read away!
I know that more people should do searches, but is this the only response that you know.
 

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Yes Noob..it is....I mean why have 10 diffrent threads goin on about the same thing. Its a watse of space and bandwidth.

I mean its simple. Click "search" at the top..type whatever you want and i am pretty sure you'll get at least 4+ threads about what you want to know. If nothing comes up....then yes post a thread
 

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Yes Noob..it is....I mean why have 10 diffrent threads goin on about the same thing. Its a watse of space and bandwidth.

I mean its simple. Click "search" at the top..type whatever you want and i am pretty sure you'll get at least 4+ threads about what you want to know. If nothing comes up....then yes post a thread
:blahblah:
 

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One Inch...
 

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I haven't been hanging around this forum much lately and might have missed a few things. I can't remember any of the members running dyno tests on the 4" versus the 5" on stock or slightly bombed trucks. There are a few Cummins drivers in my area running straight through 5". They sound more like a semi than a cool running truck. I don't race mine down the strip. I have towed a 10.5K pound 5th wheel over 18K miles now. At 1900 RPM in 5th gear pulling 3 miles or 6% I have all the noise I can handle. Anymore would drown out the stereo and misses. Later! Frank

PA: I have had my share of loud pipes over the years. They contributed to my need for hearings aids in both ears.
 

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Yes Noob..it is....I mean why have 10 diffrent threads goin on about the same thing. Its a watse of space and bandwidth.

I mean its simple. Click "search" at the top..type whatever you want and i am pretty sure you'll get at least 4+ threads about what you want to know. If nothing comes up....then yes post a thread
Dude chill out. If everybody used the search button half as many people would be members since there would only be about 5 new posts a day.
 
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