Exhaust? 4in. or 5in. - Ford Powerstroke Diesel Forum
 
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post #1 of 9 Old 11-26-2012, 03:49 PM Thread Starter
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Exhaust? 4in. or 5in.

I know this has been answered before but I can't find the thread. I have an 01, 7.3, CC, long bed, Afe intake and a Super Chip programer. I am looking into after market exhaust systems. I am looking for pros and cons to both 4in. and 5in. turbo back systems (no muffler). Also if you know of anyone offering holiday pricing, that would be appreciated, or just a good place to buy. I also don't want to limit myself to future upgrades. Thank you in advance for any information you are willing to share. Happy Holidays
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post #2 of 9 Old 11-26-2012, 06:12 PM
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i have a banks 4 in turbo back system. it was on my truck when i bought it. im pretty happy with it. from what i understand anything bigger than 4in down pipe wont fit between the motor and firewall. i heard that 4in is fine but if you want it to be loud then go with the 5in. i have the banks 4in with a muffler and its plenty for me. i am going to take my muffler off and see what it sounds like. hope this helps ya.

99 7.3
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post #3 of 9 Old 11-27-2012, 03:20 AM
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Just depends on what you want your end result to be. When you say "future upgrades"...what do you have in mind? A 5" will give you a deeper tone, but a 4" can just about any amount of horsepower you will throw at it.

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post #4 of 9 Old 11-27-2012, 07:33 AM Thread Starter
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I have looked at Banks. They seem to be on the high end of the price spectrum. I would like a deep sound. That doesn't break the bank. I am also looking at installation pros and cons. I guess a shove in the right direction. MBRP? DIAMOND EYE?
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post #5 of 9 Old 11-27-2012, 08:14 AM
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farm boy diesel has good prices for both 5 or 4 inch. not sure on quality or anything though


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post #6 of 9 Old 11-27-2012, 03:42 PM
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a few folks have had issues with the mbrp kits. the downpipe occasionally hits the firewall. but most seem to be happy.
i bought 4 inch diamond eye and i really like it, install was easy and i did it by myself in my driveway. been on a year now and it still looks new.
4 inch is fine up to like 450 hp.
5 inch is just a little deeper sounding no performance gains over 4 inch.
so its entirely up to you.


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99.5 f250 7.3 4x4 260k FF 160/30, PHP Hydra, S&B CAI, 4" Exhaust, RR Billet Wheel, Autometer Gauges, Transgo, Non-Ebpv Pedestal, High Flow Outlet, 08 Tow Mirrors.

Dad-2000 7.3 4x4 110k miles, Autometer Gauges, Superchips 1705, 6637, 4" Exhaust, BD Billet Wheel, TruCool Max
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post #7 of 9 Old 11-27-2012, 04:35 PM
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i bought my 4 inch diamond eye for like 265.00.i got it through auto parts warehouse i think.i like it.
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post #8 of 9 Old 11-27-2012, 04:38 PM
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post #9 of 9 Old 11-28-2012, 01:46 PM Thread Starter
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Leaning toward the 5in. for the sound. I am just unsure what manufacture to go with. I appreciate all the positive feedback. I was sold on the MBRP but the firewall issue concerns me.
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