FlowsMasters Alone?

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lbmustang99

New Member

Apr 9, 2004

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MIA

Jul 14, 2004

#1

• Jul 14, 2004

• #1

Ok for a 04 Gt, will a pair of flowmaster mufflers sound nice or do i need to get the whole exhaust kit? I know the whole exhaust will sound better but will the flows make a change?

 

mogs01gt

Founding Member

Jul 22, 2002

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Ohio

Jul 14, 2004

#2

• Jul 14, 2004

• #2

This will answer all.
Tech God

 

Ryan02Stang

Active Member

Jun 17, 2003

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Arlington Heights, Illinois

Jul 14, 2004

#3

• Jul 14, 2004

• #3

It will still sound badass. Then if you get an offroad midpipe you better invest in some ear plugs!

 

dmarco_4u

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Mar 9, 2004

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Jul 14, 2004

#4

• Jul 14, 2004

• #4

mogs01gt said:

This will answer all.
Tech God

Click to expand...

 

d98gt

Founding Member

Mar 14, 2002

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SE Texas

Jul 14, 2004

#5

• Jul 14, 2004

• #5

t3h t3ch g0d kn0ws 3v3ryth1ng!!!!

 

hognutz

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Nov 12, 2002

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albany, oregon

Jul 14, 2004

#6

• Jul 14, 2004

• #6

I would just get the new stainless flows welded in you stock exhaust. then the system will be stainless instead of alumized like the catback.

 

mcmmotorsports

Member

Apr 12, 2004

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Danbury, CT

Jul 14, 2004

#7

• Jul 14, 2004

• #7

Only thing bad I can say about it is that welded in muffs will utilize stock crimp bend pipes. More restrictive, supposedly. Who knows what the difference in HP would be between welded mufflers and whole mandrel bent systems.

 

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GONEN60

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May 10, 2004

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Jul 14, 2004

#8

• Jul 14, 2004

• #8

I have flowmasters welded in and it sounds better than the stock set up, Im not sure if it added any HP, but my flowmasters 40 with my K&N makes my GT sounds like it has bigger balls than it does

 

jrc_03_gt

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Jan 1, 2004

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Jul 14, 2004

#9

• Jul 14, 2004

• #9

weld in original 40 series and then just get a mac off road h pipe! It will scream!

 

GTn00b

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May 25, 2004

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Independence, MO

Jul 14, 2004

#10

• Jul 14, 2004

• #10

I had weld in flows for 2 or 3 weeks on my gt I loved the way it sounded then I went and bought a Mac off road h pipe and now it is very loud I love it.

 

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Rocketman

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Apr 20, 2004

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SoCal

Jul 14, 2004

#11

• Jul 14, 2004

• #11

hognutz said:

I would just get the new stainless flows welded in you stock exhaust. then the system will be stainless instead of alumized like the catback.

Click to expand...

I welded Series 50 3 chamber flows into my stock system. Sound great IMO. Couldn't really tell if there was any performance gain.

 

smokin'Red35th

Member

Jan 9, 2004

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Las Vegas, NV

Jul 14, 2004

#12

• Jul 14, 2004

• #12

I currently have exactly that. completely stock exhaust but with welded in flowmaster 40 series mufflers. Sounds great! but now i want more. off road h-pipe is next to come:d
You wont be dissappointed in the sound!

 

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3.8L_of_Pain

New Member

Jul 4, 2004

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Southern California -- Orange County

Jul 14, 2004

#13

• Jul 14, 2004

• #13

mcmmotorsports said:

Only thing bad I can say about it is that welded in muffs will utilize stock crimp bend pipes. More restrictive, supposedly. Who knows what the difference in HP would be between welded mufflers and whole mandrel bent systems.

Click to expand...

The 2.5" cat-back systems will add about 4 rwhp and up to 0.2 sec on ET over just welding mufflers to factory tubing. I have sources for this information if interested.

 

NewStangNewbee

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Jul 2, 2004

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Jul 14, 2004

#14

• Jul 14, 2004

• #14

yes intrested

 

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3.8L_of_Pain

New Member

Jul 4, 2004

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Southern California -- Orange County

Jul 14, 2004

#15

• Jul 14, 2004

• #15

NewStangNewbee said:

yes intrested

Click to expand...

This informative article discusses several cat-back kits and the table at the end shows the best ET with each.

http://www.allfordmustangs.com/Detailed/70.shtml

It was for a 90 LX 5.0, but I think the trends should be similar for 94 to 04 GTs.

The site seanhylandmotorsports.com used to have an outstanding article where they dyno tested numerous bolt-on mods on a 2000 GT. It looks like the article was published in the February 1999 issue of 5.0. Luckily, I printed the article.

Anyway, they dyno tested 4.2 rwhp with a Dynomax 2.5" cat-back with Ultra Flow (straight thru) mufflers.

 

JBushman73

Founding Member

Aug 29, 2001

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Roanoke, VA

Jul 15, 2004

#16

• Jul 15, 2004

• #16

.

Get two American Thunders welded in and have them cut off the last two cats. Now that will sound bad as*.

 

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schaake30

New Member

Feb 14, 2004

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Edwardsville, IL

Jul 15, 2004

#17

• Jul 15, 2004

• #17

I have Flows welded in, but the mid pipe really makes a difference

 

mcmmotorsports

Member

Apr 12, 2004

689

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Danbury, CT

Jul 15, 2004

#18

• Jul 15, 2004

• #18

JBushman73 said:

Get two American Thunders welded in and have them cut off the last two cats. Now that will sound bad as*.

Click to expand...

What about cutting the first two?

 

kboy262

Active Member

Apr 20, 2003

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Atlanta-Kennesaw

Jul 15, 2004

#19

• Jul 15, 2004

• #19

mcmmotorsports said:

What about cutting the first two?

Click to expand...

Just get a MAC o/r H-pipe for 120.

 

JBushman73

Founding Member

Aug 29, 2001

172

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Roanoke, VA

Jul 15, 2004

#20

• Jul 15, 2004

• #20

First 2 cats are a no go.

One of the front 02 sensors is built into the drivers side cat. Leaving the front two aren't a big deal since they are so small. The back two are pretty large cats.

You need to leave the first two to pass a visual state inspection not to mention your computer will not like that. Yea you can get an O/R H for 120 and spend a few hours putting it on. But do you want to have to take it off and put your stock exhaust on every year for inspection. People sware I have a O/R H on mine but I just tell them I cut the rear 2 cats off and show them.

Of course MIL's would eliminate the computer problem with O/R H pipe. Cut my back two off and no computer problems here. I cut the last 4 of 6 cats on my 98 and didn't have a problem either. I never did have to use the MIL's I bought for it.