Considering a 4" exhaust - Ford Powerstroke Diesel Forum
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Old 03-29-2012, 09:23 AM
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Considering a 4" exhaust

Hello to all, I have been considering going to a 4" exhaust. I pull a couple of good size trailers, 25' beavertail gooseneck and a 35' 5th wheel, occasionally. I'm not looking for more sound just the other benefits that go with a 4" exhaust.

PTP has the MBRP S6206AL for $327.24, 15% off, shipped free with a 5" tip. I'm trying to keep whats left of my hearing, too much loud music, guns and equipment for 60 years, is the reason for this kit.

Anyone know of a better deal than that for a 4" turbo back exhaust?
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Old 03-29-2012, 04:18 PM
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On Monday I ordered an MBRP 4" Turbo back (S6212PLM) for $251.11 and free shipping from XDP using code: diesel10. Tracking shows delivery for April 4th.
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Old 03-29-2012, 05:33 PM
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I got my MBRP 4 inch turbo back from thorobred diesel for 243 shipped
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Old 03-29-2012, 05:49 PM
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A LOT of guys wish they had gone 5" instead of 4". Food for thought there.

Things that have been said about 4": more turbo whistle, louder in a high pitch kind of way.

Things that have been said about 5": more engine "rumble" instead of turbo whistle, turbo whistle is still audible though, lower pitched, possible feeling that you lose low end (reality is you don't).

When I get a 5er or a goose I will have to get rid of my duals. I plan on going with the 5".
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Old 03-29-2012, 07:02 PM
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Most 5" exhausts are 4" for 1/3 to 1/2 of the system anyway. From inside the cab you will more than likely not notice a difference and from outside it isn't much of a difference. I came to this conclusion last week when I ran across a chick with 4" straight exhaust on an 04'. I work with a guy that has 5" straight exhaust on an 05' and after hearing both I couldn't justify the extra $75-$100 for the 5" system. A penny saved is a penny spent on more mods since I want studs, EGR delete (capable of passing visual), Banks or AFE Intercooler, PMax w/Batmowheel, SCT X3, GoGo Intake..., and the list goes on and on. It all comes down to personal preference. Just my
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Old 03-29-2012, 07:30 PM
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Won't the GoGo intake kinda give away the fact that the EGR cooler is deleted NSublet...?
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Old 03-30-2012, 08:18 AM
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@ dieselmatt: The GoGo Intake can be modified so my EGR system will bolt on but not function. It will be like welding a hollowed cat over the delete pipe. All I need is to pass visual inspection and a 60% opacity test. The smog guy I use doesn't want to be tied to a truck that can't pass visual in case the gestapo were to look.

@ jerdebson: I'm sorry about hyjacking your thread, it's all yours again. Did you figure out the exhaust your getting?
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Old 03-30-2012, 06:50 PM
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The exhaust I am looking at uses the stock cat and has a free flow muffler. I'm not looking for more sound but maybe a little more MPG and a little less heat when pulling a trailer. I am still "researching" the matter. Thanks for your thoughts. That series has a three year warranty also. The reason I am looking at a turbo back system is to go from 3.25" down pipe to a 3.5" with a smooth bend. Everyone has their own ideas but I wanted to bounce mine off of some of you with experience in the matter. Thanks.
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