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post #1 of 16 Old 02-06-2012, 09:27 AM Thread Starter
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Does size matter?

Howdy, is there any performance loss with a 5" turbo back exhaust as opposed to a 4" one? I have a 99 F350 and all I have done so far is an intake.....thanks....
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post #2 of 16 Old 02-06-2012, 10:02 AM
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a different tone is all you will get with a 5" exhaust. As long as you replace the downpipe with a 4" downpipe anything after that is really upto you. Exhaust kits are becoming so cheap anymore, its really up to you if you wanna spend just a tad bit more for the 5" exhaust or not.

Robert
01 F350 CCSB
a few mods


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post #3 of 16 Old 02-06-2012, 10:14 AM
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Agrees with 7.3L550:

01F250-4WD-XLT-AUTO-CC-7.3L-{295K} Miles
Donaldson AIS Intake System w/Zoodad
4''Turbo Back MBRP Exhaust
Remote Spin-on Coolant Filter/Red {ELC}&RMI-25
Remote Spin-on Transmission Filter/Lg Magnet
203*F T-Stat w/Billet Housing
CCV Re-route
SS HPX Line
Many Other Small Mods
---------------------------------------------------
Oil-------->T6 w/Amsoil Filter & Lg Magnet
AMSOIL-------->Every where else
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post #4 of 16 Old 02-06-2012, 10:39 AM Thread Starter
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I bought a MBRP with a 6" tip but was worried bout back pressure and lowend response..So is the 5" a better sound? Lol
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post #5 of 16 Old 02-06-2012, 10:42 AM
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I personally like the 4" sound on both the 7.3 and 6.0. It's all personal preference.

2006 F350 Lariat Crew

MBRP 4" Turbo Back Exhaust
Sinister Coolant Filter
EGR Delete
BPD FICM
High Idle Mod
Blue Fuel Pressure Spring
CCV Reroute
Fisher 8.5' Extreme V Snow Plow
SCT X3 Custom Tuned by Gearhead Automotive Performance

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post #6 of 16 Old 02-06-2012, 10:46 AM
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I have never heard of receiving poor performance from the 5" compared to the 4" only a sound difference... I have heard only 1 or 2-5" exhausts... I really thought they sounded very good.... I do think both had mufflers installed... as for a 5" with no muffler? I have no idea... maybe a bigger Jet... LoL... I think both were on 6.0L...

I have heard the down pipe is the main key to performance...

As for sound? It all depends on the owner... I personally love the sound of 7.3L with 4" turbo back w/delete pipe.... Sounds like a jet!!! Awesome sound... In town would be ok... But on the interstate or highway? Na.... I like a nice quiet cab... to hear crystal clear music or carry on a conversation...

01F250-4WD-XLT-AUTO-CC-7.3L-{295K} Miles
Donaldson AIS Intake System w/Zoodad
4''Turbo Back MBRP Exhaust
Remote Spin-on Coolant Filter/Red {ELC}&RMI-25
Remote Spin-on Transmission Filter/Lg Magnet
203*F T-Stat w/Billet Housing
CCV Re-route
SS HPX Line
Many Other Small Mods
---------------------------------------------------
Oil-------->T6 w/Amsoil Filter & Lg Magnet
AMSOIL-------->Every where else

Last edited by SyN; 02-06-2012 at 10:49 AM. Reason: Shut Your Mouth!!
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post #7 of 16 Old 02-06-2012, 10:50 AM
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No matter what a woman tells you, size does matter. Oops wrong topic, lol.

Belz
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post #8 of 16 Old 02-06-2012, 10:52 AM
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If your wife tells you Size does not Matter!!! You Best start to Worry!!

01F250-4WD-XLT-AUTO-CC-7.3L-{295K} Miles
Donaldson AIS Intake System w/Zoodad
4''Turbo Back MBRP Exhaust
Remote Spin-on Coolant Filter/Red {ELC}&RMI-25
Remote Spin-on Transmission Filter/Lg Magnet
203*F T-Stat w/Billet Housing
CCV Re-route
SS HPX Line
Many Other Small Mods
---------------------------------------------------
Oil-------->T6 w/Amsoil Filter & Lg Magnet
AMSOIL-------->Every where else
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post #9 of 16 Old 02-06-2012, 11:18 AM
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i have a 4inch turbo to 5inch stacks exhaust. lets just say you know your truck is running and the turbo is spooling and you wont forget
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post #10 of 16 Old 02-06-2012, 12:06 PM
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Been doing this research on my own. Some say with the 5" you lose some low end torque but turbo spools faster than with the 4" but many also agree that you can't tell that much difference.



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