4" or 5" exhaust - Ford Powerstroke Diesel Forum
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post #1 of 21 Old 11-14-2012, 08:11 PM Thread Starter
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4" or 5" exhaust

I'm looking to get a new exhuast for my 2001 7.3 I was curious what are the differences between 4" and 5" exhaust besides diameter. I have found them turbo back about 100$ difference.


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post #2 of 21 Old 11-14-2012, 08:13 PM
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Not much difference, the 5inch will be a little deeper....so a 4inch will be fine, but u will want the 5inch down the road.....just do it big the first time and save some money
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post #3 of 21 Old 11-15-2012, 06:48 AM
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Agreed. I like to go big on everything for my truck so I went with a 5". I found a 5" diamond eye turbo back with 4" DP for about $350. I'm not sure where I found it cuz that was 4 years ago. But I love the sound. It's deep and you can hear the turbo a lot more.


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post #4 of 21 Old 11-15-2012, 10:57 AM Thread Starter
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Yeah it's still the same price do you like that exhaust ?


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post #5 of 21 Old 11-15-2012, 12:23 PM
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I went with 4" from Summit Racing $385. I like my MBRP. Sounds good. There is no need or benefit in a 5" besides a slightly deeper sound.
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post #6 of 21 Old 11-15-2012, 05:37 PM Thread Starter
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Is their any difference in mbrp and the diamond eye?



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2001 7.3L powerstroke w/80,000 miles
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Edge Evolution Programmer
Halo CCFL Headlights
2 12" Crossfire subs
Smoked Putco Cab Lenses
Red LED Cab Lights
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Recon 3rd Break Light
Smoked Putco Dually Lights
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post #7 of 21 Old 11-15-2012, 05:42 PM
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Not really. I got the diamond eye stainless 5" and I like it alot. All fit well and went together nicely.


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post #8 of 21 Old 11-15-2012, 05:47 PM
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Diamond Eye are a little less expensive I believe. I just went with MBRP because my buddy's had used their exhausts and liked em. Some people here LOVE their Diamond Eyes.
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post #9 of 21 Old 11-15-2012, 05:48 PM
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no difference between the two.
i bought my 4 inch diamond eye off ebay for like 270$.
you only need 5 inch exhaust if you have big hp.
for a mildly modded 7.3 4 inch is more than enough.
install of diamond eye was super easy in my opinion.

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post #10 of 21 Old 11-24-2012, 12:35 PM Thread Starter
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I just bought a 5" magnaflow. Exhaust comes with a muffler delete pipe. It's turbo back. For 290$ shipped to my house . I couldn't pass up on the deal from XDP.


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2001 7.3L powerstroke w/80,000 miles
Crew Cab DRW Long Bed
Edge Evolution Programmer
Halo CCFL Headlights
2 12" Crossfire subs
Smoked Putco Cab Lenses
Red LED Cab Lights
Line Of Fire
Recon 3rd Break Light
Smoked Putco Dually Lights
Smoked Halo Fog lights
Black and Red Custom Grill
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