Flowmaster break in period?

slayerripkdc

15 Year Member

Jun 3, 2003

1,341

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59

brewster ny

Oct 29, 2010

#1

• Oct 29, 2010

• #1

Just installed my 40 series with stock H. I realize the stock cats will quiet things down a bit. Do they usually get a little louder after a few hundred miles or what? Can't wait to install my O/R H .

 

Jacob_Royer

Member

Nov 24, 2007

142

1

19

Oct 29, 2010

#2

• Oct 29, 2010

• #2

Flowmasters are quiet with stock cats. OR pipe FTMFW! before my xpipe my flows where no louder than the stock mufflers!

 

slayerripkdc

15 Year Member

Jun 3, 2003

1,341

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59

brewster ny

Oct 29, 2010

#3

• Oct 29, 2010

• #3

You have American Thunder mufflers. I have the 40 series. I think the 40's are a tad more throaty then the AT'S. I could be wrong.

 

D

Deleted member 38176

Oct 29, 2010

#4

• Oct 29, 2010

• #4

slayerripkdc said:

You have American Thunder mufflers. I have the 40 series. I think the 40's are a tad more throaty then the AT'S. I could be wrong.

Click to expand...

The AT kits uses 40-series muffs

 

BlownFiveLiter

have car, will race....wait, it doesn't run

15 Year Member

Nov 29, 1999

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Chicagoland

Oct 29, 2010

#5

• Oct 29, 2010

• #5

Flowmasters don't have any packing inside of them that will "break-in," so what you hear is what you get. Lose your cats and you'll really hear a difference, as Jacob Royer mentioned.

 

I

ItsStock02

Member

Aug 18, 2008

492

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19

Westland, MI

Oct 29, 2010

#6

• Oct 29, 2010

• #6

My car came with flowmasters welded in the stock cat back. With the stock h-pipe it sounded like a stock Mustang, but it was slightly louder. I liked how it sounded, but i like how it sounds with my o/r prochamber even more.

 

joshwfl

Member

Jan 31, 2010

111

0

16

Oct 29, 2010

#7

• Oct 29, 2010

• #7

I have an o/r H with 40's and it sounds sweet. Lots of crackling on decel, much louder than the vid makes it seem. Not everyone likes it, I love it!

YouTube - 2000 Mustang GT 5 speed H pipe, cat delete, dual 40 series Flowmaster

 

westgastang5.0Coyote

15 Year Member

Sep 24, 2008

192

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Temple,Ga

Oct 30, 2010

#8

• Oct 30, 2010

• #8

As everyone else said what you see with them right now is what you get. But a o/r prochamber is one of the best combos i've heard with flows.

 

slayerripkdc

15 Year Member

Jun 3, 2003

1,341

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59

brewster ny

Oct 30, 2010

#9

• Oct 30, 2010

• #9

American Thunder does not come with the original 40 series, they come with super 40's. They are a little more mellow.

 

68stang351

Founding Member

May 16, 2002

850

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39

Savoy TX

Oct 30, 2010

#10

• Oct 30, 2010

• #10

You have to get rid of that mid pipe.

Here's my 04 with off road x and flowmaster 40's.
YouTube - My 04 GT


My buddie's 01 with the same mufflers but with a off road prochamber.
YouTube - 01 Gt mustang

 

Twista

Active Member

May 7, 2004

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29

@ the z00 in chicago

Oct 31, 2010

#11

• Oct 31, 2010

• #11

Sorry, bud. I went through this before but with a mac aftermarket hi flow catted H pipe. It was stock quiet... it pissed me off so bad. SO SO SO bad. I added a o/r prochamber and the car woke up so much. I then added a mac o/r H and boy it was loud.


What you hear now.. is the sound your going to keep unless you change the midpipe

 

G

GettinThere

Member

Jul 29, 2005

553

1

19

Central Texas

Nov 1, 2010

#12

• Nov 1, 2010

• #12

joshwfl said:

I have an o/r H with 40's and it sounds sweet. Lots of crackling on decel, much louder than the vid makes it seem. Not everyone likes it, I love it!

Click to expand...

+1000 The crackling sounds so juvenile

The drone was a bit annoying, but the 4.10 gears somehow reduced that.