Advice for my 04 Duramx - Diesel Truck Forum -
Thread Details Posted by T W Graddy, this thread has received 4 replies and been viewed 1417 times.

LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 07-04-2011, 09:55 PM Thread Starter
Junior Member
Join Date: Mar 2009
Posts: 31
Points: 21,837
Thanks: 2
Thanked 1 Time in 1 Post
Advice for my 04 Duramx

I want too upgrade my exhaust on my 04 Duramax it has factory stock on it now. Looking for this to help with fuel mileage. Not looking for sound just what is the best. What size do I need and what kind muffler. I was told too cut the muffler off and that would make a huge difference .. just didn't sound right too me any suggestion?
Thanks T Graddy
T W Graddy is offline  
Sponsored Links
post #2 of 5 (permalink) Old 07-10-2011, 01:35 AM Thread Starter
Junior Member
Join Date: Mar 2009
Posts: 31
Points: 21,837
Thanks: 2
Thanked 1 Time in 1 Post
any suggestion? Guess not !
T W Graddy is offline  
post #3 of 5 (permalink) Old 07-10-2011, 02:00 PM
BriteWhiteRam's Avatar
Join Date: Oct 2006
Location: Alberta, Canada
Posts: 4,320
Points: 63,257
Thanks: 350
Thanked 506 Times in 416 Posts
magnaflow 4" pro series, you can get it for a pretty reasonable price, and its all stainless steel

and on the LB7 you want a muffler, straight piped they will drone pretty badly at highway speeds, it might get you a gain of 1 or 2 mpg but that all depends on how you drive, the best bang for your buck when it comes to an increase in mileage is a tuner

Aaron the Crazy Canuck
2006 Chevrolet Silverado LT 2500: LBZ - Allison, Greystone Metallic, 4x4,PPE airbox mod, missing muffler/cat, EFILive tuned by Nick at duramaxtuner, MA tie-rod sleeves and Grade C headgaskets
Totalled!! May 2nd 2008-2005 Dodge Ram 3500 laramie: Cummins auto, plain white, rebuilt tranny
1986 Mercury Capri - 5.0L, AOD, shorty headers, acell ignition, Holly street dominator intake, Holly 625 vacuum secondaries carb, Dual glass packs "my little yellow terror"

DURAMAX INDEX; You want a Duramax? you want to click on this >>The Duramax Index

Canadian Club Member #1
Singles Club member #186
Ridin Dirty Club #5


Check out the NEW and IMPROVED TDG Truck Poll!
BriteWhiteRam is offline  
post #4 of 5 (permalink) Old 07-11-2011, 06:21 PM
Pardue the Traveler
New 0mega's Avatar
Join Date: Jun 2009
Location: Forestburg Alberta Canada
Posts: 4,023
Points: 51,411
Thanks: 101
Thanked 253 Times in 238 Posts
Send a message via Yahoo to New 0mega
I like the MBRP 4" downpipe back. You could cut the cat and muffler and put flex pipe in but it's no replacement for an exhaust system.

Smoke!!! Smoke!!!! Are you Smoking yet?
2007.5 Sierra 2500HD SLE 6.6L Duramax Extended Cab Long Box Z71 Fass 150/95, Rare Parts G2 hd tie rods, EFi Live, DSP5 a tune from, MBRP 4" Downpipe back, Edge CTS Insight, Cognito Idler/Pitman Arm Braces, PPE Deep Transmission pan, deep pan filter, Transgo Jr kit
Canadian Club member #2
Singles Club member #250  0528
For those whom are looking at a Duramax check this thread out.
New 0mega is offline  
post #5 of 5 (permalink) Old 07-11-2011, 07:52 PM
In the passing lane
Kip's Avatar
Join Date: Dec 2008
Posts: 1,453
Points: 48,329
Thanks: 56
Thanked 77 Times in 67 Posts
If you want mileage get a tuner don't waste your money on exhaust IMO

2005 2500HD DIRTYMAX 6in lift, dual exhaust, afe airbox. Tuner soon to come

2001 PSD shortbed crewcab, ATS tranny edge juice w/attitude, Superchips programmer, Gauges, exhaust, 4inch lift w/35s, (SOLD)

Originally Posted by sledneck57
Your sweating like a queer holding a hot
Kip is offline  

Quick Reply

Register Now

In order to be able to post messages on the Diesel Truck Forum - forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
need advice turfin8705 Duramax 2001-2004 (LB7) 5 06-21-2009 02:05 AM
Advice Please pstrang 2003-2007 6.0L Power Stroke 2 06-11-2009 02:11 PM
vendors advice and expert advice needed silverpeteok 5.9L Cummins (1998.5-2002) 11 01-25-2009 10:08 PM
Would like some advice. elkman 5.9L Cummins (Pre 1994) 5 05-19-2007 10:37 PM
advice? ccp 1994-2003 7.3L Power Stroke 12 05-16-2007 06:56 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome