4 inch down pipe??
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Senior User
Joined: Sep 2008
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From: Jasper, tx
4 inch down pipe??
I just got back from the dealer ordering some stuff and found out me ol' warranty is up. Well that means time to play. Does anyone know if there is an exhaust manufacturer that has a 4" down pipe I've read MBRP is 3 1/2.If I'm gonna do it I want it to 4 all the way!
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Senior User
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From: Jasper, tx
Posting Guru
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From: NorCal
There are some 4" downpipes but you will have to do some modifying to your firewall and to the downpipe to get it to fit!
That is why the majority of the systems use a 3-1/2" downpipe.
I believe Borla has a 4" downpipe but call to be sure: Borla Performance Industries -
That is why the majority of the systems use a 3-1/2" downpipe.
I believe Borla has a 4" downpipe but call to be sure: Borla Performance Industries -
Postmaster
Joined: Sep 2006
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i have Magnaflow system it has 4" downpipe and i didnt modifie the pinch weld, fitted right in, no problem, didnt have to do much adjustment either, not much more noise inside and nice sound to it.
BTW mine is SS and was like 600, for dual exhaust.
BTW mine is SS and was like 600, for dual exhaust.
Senior User
Joined: Jan 2007
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From: Bountiful, Utah
The muffler shop had to barely modify the pipe (small dent with a hammer) so it would clear the Right side Turbo up-pipe. $850.00 installed.....
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Elder User
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From: Cedar Springs,MI
I've got a Magnaflow 4" turbo-back. I installed it myself and the downpipe was a breeze to install. I did not have to beat on it at all.
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Joined: Jan 2006
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From: Prince George
4" magnaflow on mine SS put it in myself needed to cut a small stud off the firewall no other problems fit right in loads of room at least 1" clearance from anything worked really well. Cost me $400 shipped to my door from down there to up here! Noticeable change in performance.
Posting Guru
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From: Lexington,Ky / Owensboro
http://www.mkopower.com/index.cfm?pv...t&pcat=Exhaust
I had to email stealth about the system with a 4" down pipe
http://www.stealth-automotive.com/contact_us.html
these are alot cheaper systems than mbrp and magnaflow
Postmaster
Joined: Sep 2006
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maybe cheaper , but not better or equal to the magnaflow or MBRP. first off most guys get SS systems unless you dont live in Snowbelt and you never see snow, or you not planning to keep your truck.
than i paid 400 for duals SS, than got AccuSeal clamps 80$ and 120 for SS tips. 600$ so the only diference betwen Magnaflow SS and Stealth is 150$. and one is SS and one aluminum.
i had MKO system on my 7.3 and its a quality job exhaust, than i had HOG system on 7.3 which i would not recommend, the fit was not as good as MKO and was not to happy.
so those my opinions.
than i paid 400 for duals SS, than got AccuSeal clamps 80$ and 120 for SS tips. 600$ so the only diference betwen Magnaflow SS and Stealth is 150$. and one is SS and one aluminum.
i had MKO system on my 7.3 and its a quality job exhaust, than i had HOG system on 7.3 which i would not recommend, the fit was not as good as MKO and was not to happy.
so those my opinions.
5th Wheeling
Joined: Aug 2008
Posts: 48
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From: Maine
not trying to hijack the thread, but i wanted to ask since this is an issue i am interested in as well. For those of us who have to run cats for whatever reason, if we were to convert to a 4" downpipe, would our stock cat still work? would we have to find a cat with a 4" inlet? anyone know what the diameter is on the outlet of a stock cat?
thanks,
jason
thanks,
jason
Postmaster
Joined: Sep 2006
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you can cut the pipes of the old CAT and have 4" pipes welded to it. the pipe is 3.5" but its larger by the cat,4". all you need is a welder and you can get crafty. somone did it on thes forum. dont remember who....