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Spoke with Magnaflow

2920 Views 39 Replies 16 Participants Last post by  RednecknDesigns, 
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Those guys need to update there website due to incorrect pictures supplied with part numbers. I wanted a 5 inch exhaust straight from the flange. They said it turns to 5 inch after 12-15 inches. Basically after the bend. Although the picture shows different. Was going to consider Silverline but I have heard that FBD's kit turns 5 inch right after the turbo within inches. Can anyone confirm any of these tales. I just want a true 5 ich thats gonna fit good. Thanks inadvance.
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So whos got the true 5 inch downpipe and all.:popcorn:
Anyone?
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M
penche07 said:
Those guys need to update there website due to incorrect pictures supplied with part numbers. I wanted a 5 inch exhaust straight from the flange. They said it turns to 5 inch after 12-15 inches. Basically after the bend. Although the picture shows different. Was going to consider Silverline but I have heard that FBD's kit turns 5 inch right after the turbo within inches. Can anyone confirm any of these tales. I just want a true 5 ich thats gonna fit good. Thanks inadvance.
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Well I think you called and spoke to me yesterday and I did have them make the correct fixes on our site. I explained to you about the downpipe and where the change was. I think I helped you as best as I could. I am sorry if you feel you were given the run around but I feel like I said I did the best I could for you.
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MOPAR MAN
Also both Magna Flow & Silverline the muffler necks down to 4" inside. Just and FYI
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MOPAR MAN said:
Also both Magna Flow & Silverline the muffler necks down to 4" inside. Just and FYI
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"FYI"

We do that to due to the fact that it helps with the noise factor. With it necked down to 4" inside the muffler there was no negative loss on the dyno either.
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D
The outlet for the turbo is 4" so you need a pipe that will merry with it. This is the reason for a 4" downpipe. 15" of 4" pipe won't make any difference in anything.
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MOPAR MAN
MagnaflowRep said:
"FYI"

We do that to due to the fact that it helps with the noise factor. With it necked down to 4" inside the muffler there was no negative loss on the dyno either.
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What is the point of running a 5" system if it closes up to 4"? That does not make sence to me.
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MOPAR MAN said:
What is the point of running a 5" system if it closes up to 4"? That does not make sence to me.
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Cooler EGTs.
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kingjames30-378
I Have the 5" and love it. no drone like the 4" dual mbrp i had.
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MOPAR MAN
DieselRookie said:
Cooler EGTs.
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I guess I just dont see how it could have cooler EGT's over a 4" system. If you have a 5" system with a 4" muffler i just dont see how it could flow any more than a 4" system. It still has 4" of free flowing exhaust. Not 5". That why i took my silverline muffler off and now have a MBRP with a 5" core and it sounds BAS A:butt::butt: Im not trying to argue with anyone hear. I just dont understand it thats all.
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flem
penche07 said:
I have heard that FBD's kit turns 5 inch right after the turbo within inches.
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yes it does... not exactly how far it is but it isn't very far at all... probably the best downpipe I have seen out there as far as 5" goes
:thumbsup
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MOPAR MAN said:
I guess I just dont see how it could have cooler EGT's over a 4" system. If you have a 5" system with a 4" muffler i just dont see how it could flow any more than a 4" system. It still has 4" of free flowing exhaust. Not 5". That why i took my silverline muffler off and now have a MBRP with a 5" core and it sounds BAS A:butt::butt: Im not trying to argue with anyone hear. I just dont understand it thats all.
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With the 5" there is more surface area for the air to cool opposed to the 4". The EG starts cooling as soon as it leaves the manifold prior to exiting the pipe. 5" also flows more CFM even though it bottlenecks slightly in the muffler.
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flem
DieselRookie said:
Cooler EGTs.
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MOPAR MAN said:
I guess I just dont see how it could have cooler EGT's over a 4" system. If you have a 5" system with a 4" muffler i just dont see how it could flow any more than a 4" system. It still has 4" of free flowing exhaust. Not 5". That why i took my silverline muffler off and now have a MBRP with a 5" core and it sounds BAS A:butt::butt: Im not trying to argue with anyone hear. I just dont understand it thats all.
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it doesn't make much sense to me either...
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flem
DieselRookie said:
With the 5" there is more surface area for the air to cool opposed to the 4". The EG starts cooling as soon as it leaves the manifold prior to exiting the pipe. 5" also flows more CFM even though it bottlenecks slightly in the muffler.
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something that flows 5" all the way thru is gonna be more efficient than something that necks down to 4 and back up to 5
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Meyer
im with mopar man im not buying a system that goes down to 4" if its a 5" not matter what the noise difference is.

Tyler
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MOPAR MAN
DieselRookie said:
With the 5" there is more surface area for the air to cool opposed to the 4". The EG starts cooling as soon as it leaves the manifold prior to exiting the pipe. 5" also flows more CFM even though it bottlenecks slightly in the muffler.
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If you say so. I personaly dont see how it could possibly flow more than a 4" system. The muffler core is 4" I dont see how its possible to flow more than 4" worth of air/exhaust thru a 4" hole. Im sorry but I just dont see how it is possible.
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flem said:
something that flows 5" all the way thru is gonna be more efficient than something that necks down to 4 and back up to 5
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Agreed. I was referring to a 5" opposed to a 4".
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flem
MOPAR MAN said:
If you say so. I personaly dont see how it could possibly flow more than a 4" system. The muffler core is 4" I dont see how its possible to flow more than 4" worth of air/exhaust thru a 4" hole. Im sorry but I just dont see how it is possible.
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5" all the way thru will flow more period... so :agree2: with ya
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MOPAR MAN said:
If you say so. I personaly dont see how it could possibly flow more than a 4" system. The muffler core is 4" I dont see how its possible to flow more than 4" worth of air/exhaust thru a 4" hole. Im sorry but I just dont see how it is possible.
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Yeah, I definitly see your point. I may be wrong but if nothing else 5" for looks. I like my setup because there is no drone at highway speeds or towing.
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MOPAR MAN
I would recomend the MBRP muffler it has a 5" core and sounds AMAZING! the only down side is its not stainless. But I dont know of any true 5" core mufflers that are S.S. and i did look for quit a wile.
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