4" or 5" exhaust - Ford Powerstroke Diesel Forum

6.0L Performance Parts Discussion What has or has not worked for you?

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post #1 of 12 Old 04-07-2009, 04:51 AM Thread Starter
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4" or 5" exhaust

I am so up in the air which is better for my truck. I have a 05 6.0. I want to do a exhaust then intake and hear pros and cons about them both. Which is best.........
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post #2 of 12 Old 04-07-2009, 05:02 AM
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There is no best, it depends on what you want your truck to sound like. Do a search on youtube and see which one you like better. I'd recommend getting a 3.5" downpipe; if you are planning on getting a turbo and injectors get a 4" downpipe.

My 06 has a 4" turbo back that's straight piped and sounds great. It is loud anytime over 2500 rpm but cruising down the freeway you hardly know it's there.

2006 F-250 Crew Cab XLT long bed FX4, 6.0L auto.
Innovative Tuned SCT, ARP head studs, Spearco Intercooler, FASS fuel system, 4" Exhaust, Intake elbow, AFE stage 2 XP intake, DiPricol gauges, PML trans pan, CCV reroute, Zoodad mod, Train horns
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post #3 of 12 Old 04-07-2009, 05:21 AM
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3.5" downpipe with a 4" exhaust is all the truck needs as far as performance unless your gonna do alot of mods like bigger injectors/propane etc, my son-in-laws Excursion originally had a 4" downpipe and 5" Silverline exhaust and we went to the 4" Banks kit with 3.5" downpipe and actually picked up a little performance towing and slightly better fuel mileage.

08 F350 Lariat SWB 4x4
Spartan tunes (120 & 210)
Pro Flo DPF/cat delete 4" syst/with muffler
AFE stage II intake
2 1/2" leveling kit/Icon adj track rod
Rancho 9000 shocks
Autopage alarm/remote start
Clarion MAX675VDII/800 watt amp and 10" sub
SS black chrome side vent screens
MotoMetal 951's with Toyo 325/60R20 A/T's
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post #4 of 12 Old 04-07-2009, 05:25 AM
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Stock intake save the cash for a stainless 4" turbo back.
The stock intake flows more than enough air.

Dale

99.5 F 350 Totaled
2000 F350 Lariate
CC
SB
4x4
4" turbo back
cold air. Zoodad
Banks big head
Wicked wheel
4" BDS lift. With Bilstein's
all brought together by TW
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post #5 of 12 Old 04-07-2009, 05:35 AM
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Here's a video of 4" inch Exhaust:
YouTube - FORD 6.0 EXHAUST

This size is perfect for a mild modded truck and sounds great.

Here's a video of 5" inch Exhaust:
YouTube - FORD 6.0 EXHAUST

This works but is mostly for 550+ power range, and for bragging rights

Hope this helps.

Cory

1995 F-250 XLT
7.3 Powerstroke Lapis Blue Metallic SuperCab ZF5 3.55 2wd Long Bed 275k miles
3.5 from the downpipe to stock 6.4 muffler, 43367 diy intake.

1993 F250 XL RCLB Turbo 7.3 IDI zf5 2wd 223k miles; 5 inch exhaust & tint -sold-
2006 F350 Lariat Harley Interior CCSB 6.0 Powerstroke 5r110 4x4 43k miles; SCT, EGR delete, ARP studs, tint, & 5 inch exhaust -sold-
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post #6 of 12 Old 04-09-2009, 06:00 AM
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The 5" with 4" downpipe sux to install too..The 3.5" downpipe is alot easier to install.

08 F350 Lariat SWB 4x4
Spartan tunes (120 & 210)
Pro Flo DPF/cat delete 4" syst/with muffler
AFE stage II intake
2 1/2" leveling kit/Icon adj track rod
Rancho 9000 shocks
Autopage alarm/remote start
Clarion MAX675VDII/800 watt amp and 10" sub
SS black chrome side vent screens
MotoMetal 951's with Toyo 325/60R20 A/T's
Bushwacker flares/painted to match trim
Harley grille
More to come(cause I can't ever leave well enough alone)

www.NixandBlack.com
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post #7 of 12 Old 04-09-2009, 06:56 AM
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I was told by Raul at stealth that There is no performance gain going to 5" just for looks.

2005 350 SDSC 4x4 Auto 6.0h no

Mods
turbo back exhaust, EGR delete, GPS, DVD, MP3
Privacy glass

For now.............................

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post #8 of 12 Old 04-09-2009, 08:21 AM
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Dont get the 5". I made the mistake of buying before researching. It looks awesome and sounds better than a 4", but it moves your powerband up which sucks for towing.

2012 F-350 King Ranch
Spartan Tuning/Flo-Pro/B&W
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post #9 of 12 Old 04-09-2009, 09:37 AM
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Seem no one wants to admit that on the 5" glad you pointed it out

Randy
2006 f250 4x4
crewcab shortbed
lariat auto
Some tuning, gauges and other assorted non factory dodads
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post #10 of 12 Old 04-09-2009, 09:53 AM
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I tow fine with my 5" exhaust. There is plenty of power. I have also had 4" duals. I would do 5 again. It just looks cool and it is nice to be able to say that you have one more inch than the next guy.

06 F250 4x4 ecsb, lowered 2", 6 Autometer Phantom 2 guages, Accufab Elbow, Zoodad, Airaid , Magnaflow 4"dp, 5" pipe 7" short stack, Studs, Egr delete, sneaky pipe, regulated fuel return, 6.4 banjo bolts, Moderate FICM from Innovative, High idle and foglight mods, Bilsteins, Sulastic shackles, DIY Harley headlights and traction bars. 8.76 in the 1/8th
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