Go Back   MustangForums.com > Ford Mustang Tech > 4.6L (1996-2004 Modular) Mustang > 4.6L General Discussion
Sign in using an external account
Register Forgot Password?
Search


4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
 
 
 
Thread Tools Search this Thread
Old 11-18-2014, 12:26 PM   #1
zachary1988
 
Join Date: Oct 2013
Vehicle: 2004 ford mustang
Location: Illinois
Posts: 20
Default headers and exhaust

I have an 04 GT and would.like to change out my exhaust system starting with headers. My first Mustang and do not have any ideas. I was thinking about the American Thunder Flomaster. Not sure about what headers and crosspipe. Thanks in advance. Ed.
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
zachary1988 is offline   Reply With Quote
Old 11-20-2014, 10:01 AM   #2
xx10Gt
4th Gear Member
 
Join Date: May 2012
Vehicle: '11 5.0, '99 cobra vert #342, '03 Mach 1 #3838
Location: New York
Posts: 1,210
Default

Quote:
Originally Posted by zachary1988 View Post
I have an 04 GT and would.like to change out my exhaust system starting with headers. My first Mustang and do not have any ideas. I was thinking about the American Thunder Flomaster. Not sure about what headers and crosspipe. Thanks in advance. Ed.
lots of questions need to be answered.. budget? do you want an x or h pipe? cats or no cats? If you choose no cats you will get a check engine light which will cause you problems if youre in a state that does obd for inspection. What kind of headers, longtube/shortube?
__________________
2011 grabber blue 5.0 premium
2003 Mach 1 (torch red) #3838
1999 Cobra convertible #342
xx10Gt is offline   Reply With Quote
Old 11-20-2014, 01:44 PM   #3
zachary1988
 
Join Date: Oct 2013
Vehicle: 2004 ford mustang
Location: Illinois
Posts: 20
Default

Quote:
Originally Posted by xx10Gt View Post
lots of questions need to be answered.. budget? do you want an x or h pipe? cats or no cats? If you choose no cats you will get a check engine light which will cause you problems if youre in a state that does obd for inspection. What kind of headers, longtube/shortube?
I do have a budget but I want to do it right. I do want to do the Flowmaster 40 series. I am not sure about which headers, long or short. BBK is a good set of headers that I was told. I heard that cross is better than the H pipe. This what I know so far. Thanks, Ed.
zachary1988 is offline   Reply With Quote
Old 11-20-2014, 02:30 PM   #4
Soldier GT
6th Gear Member
 
Soldier GT's Avatar
 
Join Date: Aug 2007
Vehicle: 2003 Ford Mustang GT
Location: MO/ Born and raised in Louisiana
Posts: 9,731
Default

Quote:
Originally Posted by zachary1988 View Post
I do have a budget but I want to do it right. I do want to do the Flowmaster 40 series. I am not sure about which headers, long or short. BBK is a good set of headers that I was told. I heard that cross is better than the H pipe. This what I know so far. Thanks, Ed.
My experience:


I run the 40's along with Flowtech LT's (thxs Rob). When I 1st bought my car I asked the same question (which was best shorties or Longtubes). Overwhelming consensus was that the LT's were much better because the shorties will not yield you any power. Being hard headed I bought the shorties and for the price of the install it was a complete waste of money. Maybe 2-3 rwhp, about as much as a CAI system.

One bit of advice I did take was with the mid pipe (X or H). If you're going with the flowmaster exhuast kit I would highly reccommend buying the H-pipe. Being that the flowmasters are a chambered exhuast system the H pipe would give your car more of a old school muscular sound. Now if you're one of those guys who would prefer a little louder sound with an occasional popping sound then go with the X.

I would guess the two maijor drawbacks of flows would be the drone sound and also the possibility that the muffler could rust out quicker than other brands like magnaflow or borla. Reason being, flowmaster mufflrs are aluminum while the magnaflows are stainless steel.
__________________


Vortech V-1 T Trim SC (intercooled)
HP 292 cams
Teksid SB bored .030 over (forged)
433 RWHP/390 RWTQ
Soldier GT is offline   Reply With Quote
Old 11-20-2014, 03:50 PM   #5
zachary1988
 
Join Date: Oct 2013
Vehicle: 2004 ford mustang
Location: Illinois
Posts: 20
Default

Quote:
Originally Posted by Soldier GT View Post
My experience:


I run the 40's along with Flowtech LT's (thxs Rob). When I 1st bought my car I asked the same question (which was best shorties or Longtubes). Overwhelming consensus was that the LT's were much better because the shorties will not yield you any power. Being hard headed I bought the shorties and for the price of the install it was a complete waste of money. Maybe 2-3 rwhp, about as much as a CAI system.

One bit of advice I did take was with the mid pipe (X or H). If you're going with the flowmaster exhuast kit I would highly reccommend buying the H-pipe. Being that the flowmasters are a chambered exhuast system the H pipe would give your car more of a old school muscular sound. Now if you're one of those guys who would prefer a little louder sound with an occasional popping sound then go with the X.

I would guess the two maijor drawbacks of flows would be the drone sound and also the possibility that the muffler could rust out quicker than other brands like magnaflow or borla. Reason being, flowmaster mufflrs are aluminum while the magnaflows are stainless steel.
I forgot to mention that I will go with the cat back since in Illinois, we have to do the air inspection. I thought the Flowmaster has the stainless system. I am going with the sound more than the hp since I am not going to do much more else. Thanks, Ed.
zachary1988 is offline   Reply With Quote
Old 11-21-2014, 08:12 AM   #6
VTX1800N1
2nd Gear Member
 
Join Date: Apr 2014
Vehicle: 2002, Ford, Mustang GT
Location: IL
Posts: 270
Default

If you want perfect sound, you need to look at Borla.

Sent from my XT1080 using IB AutoGroup
VTX1800N1 is offline   Reply With Quote
Old 11-21-2014, 01:43 PM   #7
Soldier GT
6th Gear Member
 
Soldier GT's Avatar
 
Join Date: Aug 2007
Vehicle: 2003 Ford Mustang GT
Location: MO/ Born and raised in Louisiana
Posts: 9,731
Default

Quote:
Originally Posted by zachary1988 View Post
I forgot to mention that I will go with the cat back since in Illinois, we have to do the air inspection. I thought the Flowmaster has the stainless system. I am going with the sound more than the hp since I am not going to do much more else. Thanks, Ed.
If you're worried about EPA inspections, the LT's are most def out of the question. I would look at buying a really good catback system and like my man VTX said , would be a good way to go. It'll cost about 600-700 bucks but it'll be well worth it. If you decide to buy the flows and shorties you're looking at about a Grand to 1100 bucks (parts and labor).
__________________


Vortech V-1 T Trim SC (intercooled)
HP 292 cams
Teksid SB bored .030 over (forged)
433 RWHP/390 RWTQ
Soldier GT is offline   Reply With Quote
Old 11-22-2014, 10:26 AM   #8
zachary1988
 
Join Date: Oct 2013
Vehicle: 2004 ford mustang
Location: Illinois
Posts: 20
Default

Quote:
Originally Posted by Soldier GT View Post
If you're worried about EPA inspections, the LT's are most def out of the question. I would look at buying a really good catback system and like my man VTX said , would be a good way to go. It'll cost about 600-700 bucks but it'll be well worth it. If you decide to buy the flows and shorties you're looking at about a Grand to 1100 bucks (parts and labor).
Why would the long tube headers cause issues with the inspection? So the Borla is the better exhaust even if the Flowmaster is stainless set? And the cost of $1100 or about is fair enough. Thanks, Ed.
zachary1988 is offline   Reply With Quote
Old 11-23-2014, 08:41 AM   #9
Gt04
4th Gear Member
 
Gt04's Avatar
 
Join Date: Jan 2010
Vehicle: 2004 Mustang Gt Vert
Location: Georgia/White/Gwinnett county
Posts: 1,165
Dannysaccnt
Send a message via AIM to Gt04 Send a message via MSN to Gt04
Default

Quote:
Originally Posted by zachary1988 View Post
Why would the long tube headers cause issues with the inspection? So the Borla is the better exhaust even if the Flowmaster is stainless set? And the cost of $1100 or about is fair enough. Thanks, Ed.
If they do a visual inspection long tubes won't pass because they aren't legal in emission counties and states. Hence why most websites state "for off-road use only". Keep your stock headers and just get a cat back and possibly a high flow catted mid pipe and call it a day if you have to worry about an inspection. Could end up saving you money in the long run...... if its just for sound and not performance long tubes aren't worth the money and hassle anyways.....
__________________

In search of new #s and me to stop being a lazy *** and do some work.
Gt04 is offline   Reply With Quote
Old 11-24-2014, 04:25 PM   #10
zachary1988
 
Join Date: Oct 2013
Vehicle: 2004 ford mustang
Location: Illinois
Posts: 20
Default

Quote:
Originally Posted by Gt04 View Post
If they do a visual inspection long tubes won't pass because they aren't legal in emission counties and states. Hence why most websites state "for off-road use only". Keep your stock headers and just get a cat back and possibly a high flow catted mid pipe and call it a day if you have to worry about an inspection. Could end up saving you money in the long run...... if its just for sound and not performance long tubes aren't worth the money and hassle anyways.....
Thanks for the info. I did not know that about LT headers "for off-road use only". I will keep that in mind.
zachary1988 is offline   Reply With Quote
Old 11-24-2014, 04:25 PM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 03:19 AM.

© Internet Brands, Inc.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup