Exhaust ??? - Ford Powerstroke Diesel Forum
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post #1 of 33 Old 08-08-2008, 11:25 AM Thread Starter
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Exhaust ???

I have a 4" MBRP full cat back right now... was looking at perhaps going turbo back and deleting the cat and muffler.. does anyonr know if this will make a HP difference?? and also if it will run different in the winter up here since it gets pretty dam cold

2004 F-250 Super-Cab XLT Lariat

MBRP 4-Inch Aluminized Exhaust (Cat.-Back)
AFE Pro Dry S Stage 2 Type Cx Intake System
Raven Spray Liner
Undercover Tonneu Cover
Prodigy Brake Controller
Edge Milage Max Chip
ZOODAD Mod
** NEW 2" ICON Leveling kit front**
** NEW 4" F-350 Ready lift blocks in the rear**

More to come... gotta love playing with these
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post #2 of 33 Old 08-08-2008, 11:33 AM
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Do it! Yes, it will, cat backs dont do much at all....Deleting the cat, and the muffler will improve flow, and will make it sound 10x better. As for the winter thing? Nope, wont affect anything.
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post #3 of 33 Old 08-08-2008, 11:51 AM
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The biggest thing you will gain with the downpipe is cooler EGT's

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
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post #4 of 33 Old 08-08-2008, 11:53 AM Thread Starter
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Thanks guys... I was hoping if you spend the money though it would have some HP benefit?? I just don't know anyone around here that has done one.

2004 F-250 Super-Cab XLT Lariat

MBRP 4-Inch Aluminized Exhaust (Cat.-Back)
AFE Pro Dry S Stage 2 Type Cx Intake System
Raven Spray Liner
Undercover Tonneu Cover
Prodigy Brake Controller
Edge Milage Max Chip
ZOODAD Mod
** NEW 2" ICON Leveling kit front**
** NEW 4" F-350 Ready lift blocks in the rear**

More to come... gotta love playing with these
Big Bear is offline  
post #5 of 33 Old 08-08-2008, 11:54 AM
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might gain a couple HP but not much. Exhaust is more of a supporting mod for a programmer

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
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post #6 of 33 Old 08-08-2008, 11:55 AM Thread Starter
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so should I bother?? or leave it like it is??

2004 F-250 Super-Cab XLT Lariat

MBRP 4-Inch Aluminized Exhaust (Cat.-Back)
AFE Pro Dry S Stage 2 Type Cx Intake System
Raven Spray Liner
Undercover Tonneu Cover
Prodigy Brake Controller
Edge Milage Max Chip
ZOODAD Mod
** NEW 2" ICON Leveling kit front**
** NEW 4" F-350 Ready lift blocks in the rear**

More to come... gotta love playing with these
Big Bear is offline  
post #7 of 33 Old 08-08-2008, 11:56 AM
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I would do it

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
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post #8 of 33 Old 08-08-2008, 11:58 AM Thread Starter
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even if there's no more HP?? just for sound??

2004 F-250 Super-Cab XLT Lariat

MBRP 4-Inch Aluminized Exhaust (Cat.-Back)
AFE Pro Dry S Stage 2 Type Cx Intake System
Raven Spray Liner
Undercover Tonneu Cover
Prodigy Brake Controller
Edge Milage Max Chip
ZOODAD Mod
** NEW 2" ICON Leveling kit front**
** NEW 4" F-350 Ready lift blocks in the rear**

More to come... gotta love playing with these
Big Bear is offline  
post #9 of 33 Old 08-08-2008, 12:01 PM
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more so for the cooler EGT's than anything

Email: Dave@powerstroke.org
2011 F150 Ecoboost Crew cab lariat. Custom tunes from KEM and 5Star, and Unleashed
2012 F150 Crew Cab Ecoboost stock for now-Totaled March 12 2015
2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
Bulletproof diesel FICM EGR Delete, Oil Cooler and Water Pump, and Light bar.
Dually LED lights from Stealth Automotive/Xpedition Outfitters
No Limit Fab 6.0 Cold Air Intake
http://www.bulletproofdiesel.com/default.asp
http://nolimitfabrication.com/
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post #10 of 33 Old 08-08-2008, 12:03 PM
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do 4 inch all the way out

03 F350 PSD
7.3 AUTO
EXT. CAB,
LWB, FX4
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