AFE vs MBRP?
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Elder User
Joined: Jul 2006
Posts: 530
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From: Vancouver, Washington
AFE vs MBRP?
Just a quick question on which you guys would recommend, AFE or MBRP? Besides both being 4", the MBRP cost at least $100 more! They are both Stainless, near as I can tell. I have seen pictures on Ebay postings that make the AFE look like it starts at the turbo as 3" then goes to 4" on the downpipe like stock, whereas I can't tell on the MBRP. Looking for a complete 4" system. Also, what does "turbo-back" mean. Have no cat converter. I do want a little exhaust note, but mostly a little MPG increase and allow the truck to breath easier. I have a 2002 F350 7.3 CC AT 4X4
Thanks for your help everyone. Learned more in a week on this website than I'll ever know about my last truck. 1989 Mazda B2600i 4X4 regular cab, small, but it did the job!
Thanks for your help everyone. Learned more in a week on this website than I'll ever know about my last truck. 1989 Mazda B2600i 4X4 regular cab, small, but it did the job!
Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
turbo back is just that.. all new from the turbo back..new down pipe..cat back would be from the down pipe back..you dont have a cat but it would still fit but the pipes would only be new from where a cat would be..most of us run this http://stores.ebay.com/MKO-DIESEL-PERFORMANCEvery good fit and a nice guy to talk to...there not stainless but i painted mine black with stove paint..its raited for 1200 darees..i live the white mountians of new hampshire with a lot of road salt use and dont have a spek of rust yet..ill repaint them this spring..
Senior User
Joined: Oct 2006
Posts: 320
Likes: 0
From: Salem, OR
welcome bandlgeorge
i felt the same way, i found this site about a week before i picked up my new truck.
as for your question i agree with ron i will be going for the aluminized and not stainless myself and this guys seems to have the best price...hey you could even go 5in
i felt the same way, i found this site about a week before i picked up my new truck.
as for your question i agree with ron i will be going for the aluminized and not stainless myself and this guys seems to have the best price...hey you could even go 5in
Posting Guru
Joined: Apr 2000
Posts: 1,345
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From: NorCal
I have the AFE 4" on my F350. The downpipe starts at the turbo with a 3.5" section (about 12" long) then flares out to a full 4". The output from the turbine is 3.5", and having that 12" of 3.5" pipe keeps a little back pressure to help the turbo spool up faster. Which is why I bought it. The rest of the system components are all 4" and it fits good. The only trouble I ran in to was getting the stock exhaust off the truck. I believe the MBRP is a full 4" from the turbo back.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Originally Posted by cgl
I have the AFE 4" on my F350. The downpipe starts at the turbo with a 3.5" section (about 12" long) then flares out to a full 4". The output from the turbine is 3.5", and having that 12" of 3.5" pipe keeps a little back pressure to help the turbo spool up faster. Which is why I bought it.
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Senior User
Joined: Mar 2006
Posts: 143
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From: Tucson, AZ
Originally Posted by Tenn01PSD350
How is backpressure beneficial in a turbocharged engine? Your post answers the question. If spooling quicker is a concern, how does an obstruction downstream aid in this spinning/moving process? I cannot say for sure, as I know gassers benefit from a certain amount of backpressure, but bottom line is the more air and fuel you can get in and out, the more you will gain. Anything getting in the way of that is an impairment.
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Postmaster
Joined: Oct 2004
Posts: 3,767
Likes: 1
Originally Posted by lethal5point7
It can be highly beneficial for efficiency reasons (especially at low RPM). If that were not true, then variable vane turbos would not be used. They are being used in all types of applications now. At WOT with the truck already moving, you'd want maximum exhaust flow obviously. So with the variable vane setup you get the best of all worlds.
Elder User
Joined: May 2005
Posts: 968
Likes: 0
From: Tennesee
bandlgeorge,
Give us a call on the AFE systems, we can beat the e bay price and you get a quality top flight system from a vendor that will be around when you need them in the future too!
Mark @ DPPI
Give us a call on the AFE systems, we can beat the e bay price and you get a quality top flight system from a vendor that will be around when you need them in the future too!
Mark @ DPPI
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