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American Thunder....40 series?

  • Thread starter Thread starter Synned
  • Start date Start date Aug 13, 2006
S

Synned

took tubgirl on a date and got banned
Mar 31, 2005
991
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0
Philly
Aug 13, 2006
#1
  • Aug 13, 2006
  • #1
I have a catted mac pipe and american thunder cat-back, but I don't think its as loud as it should be. Does anyone know if the catback comes with delta or 40 series flows?
I think I'm going to change them to 40 series, if they are louder.
 
T

tjh566

New Member
May 22, 2004
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Northern Va
Aug 13, 2006
#2
  • Aug 13, 2006
  • #2
My american thunder kit i bought like 2 years ago came with the regular 40 series, I have an off-road h-pipe and its decently loud but compared to my friends 96 cobra with the same settup his is 2x louder at least, but i guess that just the 4.6 motor compared to ours
 
9

95five-oh

New Member
Jun 25, 2006
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Mount Airy, MD
Aug 13, 2006
#3
  • Aug 13, 2006
  • #3
Synned said:
I have a catted mac pipe and american thunder cat-back, but I don't think its as loud as it should be. Does anyone know if the catback comes with delta or 40 series flows?
I think I'm going to change them to 40 series, if they are louder.
Click to expand...

i was actually wondering the same thing myself. ive got a catted xpipe with shorty headers with the american thunder but my freinds pickup truck with just a catback exhaust is easily louder than mine...how much louder is the original 40 series than the delta flow?
 

Adam95GT

New Member
Aug 14, 2006
2,564
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Burlington, NJ
Aug 14, 2006
#4
  • Aug 14, 2006
  • #4
Hmm if you have a chance try a super 40 series... i ran that on my probe sounded wonderful
 
M

mackey

Active Member
Jan 25, 2003
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38
Beverly, Massachusetts
Aug 14, 2006
#5
  • Aug 14, 2006
  • #5
It is the catalytic converters that are making it quiet. If you get rid of them it will be much much louder.
 
S

Synned

took tubgirl on a date and got banned
Mar 31, 2005
991
1
0
Philly
Aug 14, 2006
#6
  • Aug 14, 2006
  • #6
mackey said:
It is the catalytic converters that are making it quiet. If you get rid of them it will be much much louder.
Click to expand...
But if the american thunder are 3 chambers then wouldn't that quiet it down a bit too?
If the 2 chambers give it a more aggresive sound I'll grab them.
 
T

tjh566

New Member
May 22, 2004
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Northern Va
Aug 14, 2006
#7
  • Aug 14, 2006
  • #7
american thunder is a 2 chamber muffler
 

GRGT1994

New Member
Sep 22, 2004
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Aug 14, 2006
#8
  • Aug 14, 2006
  • #8
Going from 50 series delta flow to 40 series delta flow (or 3 to 2 chamber if you prefer to call them by that name) will increase volume some. But the Am. Thunder cat-back already comes with the 40 series delta flow 2 chamber mufflers.

Like said above, the biggest change you can make (easily) is to drop the cats. Or you could swap the cam . . .
 

donjohn

New Member
Feb 7, 2004
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Irvine - Southern California
Aug 15, 2006
#9
  • Aug 15, 2006
  • #9
anybody with 3 chambered... i'll trade you my 2 chambered American Thunder 40 series muffs
 
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