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  #1  
Old 09-21-2011, 01:32 AM
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4.7 dual exhaust ?

has any one done this if so how do u like it?
i had a magnaflow and then switched to a 40 series flow master yesterday louder at slower speeds but I think magnaflow is louder when opened up. but I still want it louder any suggestions?
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Old 09-21-2011, 04:03 AM
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Re: 4.7 dual exhaust ?

If youre going to do true duals, if any way possible, try to keep it equal length. Id run either an x pipe or H with a set of round case magnaflows. You should see a increase in power, use 2.25 or 2.5 piping.
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Old 09-21-2011, 04:31 PM
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Re: 4.7 dual exhaust ?

I am in the same boat only with my wk 5.7 . I was looking at running a muffler with a single 3" inlet and dual 2.5 outlet either in a flowmaster 70 or magnaflow . On my wj i had the flowmaster setup and loved it with my 4.7 . It had no drone but sounded awsome.
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Old 09-21-2011, 11:18 PM
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Re: 4.7 dual exhaust ?

yeah thats what i was thinking x pipe and im going to see if they will do a electric cut out for A lil fun some times.
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Old 09-21-2011, 11:25 PM
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Re: 4.7 dual exhaust ?

Quote:
Originally Posted by yetjeep View Post
yeah thats what i was thinking x pipe and im going to see if they will do a electric cut out for A lil fun some times.
Josh, make sure the piping is equal length or real close to it! if not you are wasting your time and $$$$.

If you use true duals, remember that you should buy two muffers...there are mufflers with the X pipe built in but they dont sound nor perform nearly as well.
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Old 09-22-2011, 12:01 AM
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Re: 4.7 dual exhaust ?

ok thanks what mufflers would you use for true duals?
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Old 09-22-2011, 12:14 AM
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Re: 4.7 dual exhaust ?

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Originally Posted by yetjeep View Post
ok thanks what mufflers would you use for true duals?
Depends on how loud you want it.

Ive had great success with magnaflow round mufflers, but they might be a little too rowdy for you. The other thing is how they exit...For example, my setup (3" single on a 4.7 WJ from the Y pipe back, mandrel bent tailpipe) was very noticeable in the cabin, but when I had to remove my exhaust aft of the muffler, in driving it around it was almost as quiet as stock (even though it was deafening outside ). My understanding is that the WK has better soundproofing than the WJ so your truck might be less sensitive to that sort of thing.

The wider the muffler the less likely it is to drone. The length of the muffler affects the overall pitch/tone.

http://youtu.be/nyq39w-psZg Here is an idle clip of my old setup with a 4x14" Magnaflow round muffler.

http://youtu.be/eam-z850oGo Here was an aborted dyno run, excuse the poor quality.

Borla mufflers, as well as Dynomax Ultraflows are also excellent.
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Old 09-22-2011, 01:15 AM
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Re: 4.7 dual exhaust ?

yeah no that sounds real good and yeah I want it pretty roughly haha or I was thinking side exit but I might mess them up off roading if i do that :/
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Old 09-22-2011, 01:23 AM
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Re: 4.7 dual exhaust ?

remove the muffler, get an srt8 exhaust and keep the resonators from the exhaust on it and it will sound niiiiiiiiiiiiiiiiiiiiiiiiiiiice
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Old 09-22-2011, 01:36 AM
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Re: 4.7 dual exhaust ?

i cant have them coming out the back center i have a hitch
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Old 09-22-2011, 01:04 PM
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Re: 4.7 dual exhaust ?

they make srt8 exhaust u can buy for the hitch
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Old 09-26-2011, 11:42 PM
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Re: 4.7 dual exhaust ?

but it will not be true dual and there for i will not get as much power from it correct?
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