Any HP gains with Stock Mufflers vs Flowmasters?

0

03Sleeper

New Member

Apr 29, 2003

464

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49

Fordville,USA

Apr 13, 2004

#1

• Apr 13, 2004

• #1

Hey guys I'm trying to get some info for my buddy.
Is there any HP gains from Replacing the stock Mufflers
He's got a X-pipe with cats but stock Mufflers????
Should he replace the mufflers??
If so Whith what Flows or ?????
I say No But He thinks he will see more Tourqe and 2-3 Hp??
Is this true?
Thanks
p.s.
I got Parts from Ronnie!

 

mrvax

Stay thirsty my friends

Founding Member

Nov 29, 1999

5,225

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SN Moderator: Orlando, Fl.

Apr 13, 2004

#2

• Apr 13, 2004

• #2

Well, Bierbelly from this site had Flowmasters welded into the stock system and lost 6-8 rwhp. I forget the exact #. Shoot him a PM.

 

wms004

Founding Member

Jan 15, 2002

2,864

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49

Los Angeles

www.cardomain.com

Apr 13, 2004

#3

• Apr 13, 2004

• #3

03Sleeper said:

Hey guys I'm trying to get some info for my buddy.
Is there any HP gains from Replacing the stock Mufflers
He's got a X-pipe with cats but stock Mufflers????
Should he replace the mufflers??
If so Whith what Flows or ?????
I say No But He thinks he will see more Tourqe and 2-3 Hp??
Is this true?
Thanks
p.s.
I got Parts from Ronnie!

Click to expand...

2-3 hp if not 0 would be logical. Get flows for the sound. straight thru mufflers in Some cases get 2-3 more hp than flows.

-wade

 

jrc_03_gt

New Member

Jan 1, 2004

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www.cardomain.com

Apr 13, 2004

#4

• Apr 13, 2004

• #4

get the original 40 series flowmasters! They are great!

 

Mr GT 02

New Member

Apr 8, 2004

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Peabody, MA

Apr 14, 2004

#5

• Apr 14, 2004

• #5

Get the Flowmaster American thunder cat bak system... 2-1/2" pipes (Mandrel Bent) and 3" tips!

end of posts!

 

S

slow87GT

Founding Member

Jun 5, 2000

162

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0

Tonawanda NY

Apr 14, 2004

#6

• Apr 14, 2004

• #6

when I had my mufflers done I didn't gain a thing, actually thought I lost some low end

I would leave stock mufflers, tell em to get a plenum or something else

 

R

Rio96

New Member

Sep 11, 2003

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Apr 14, 2004

#7

• Apr 14, 2004

• #7

I just don't believe that lowering backpressure lowers
engine performance.(perhaps someone has a pic of a
cut up stock muffler)
IMO, the big problem is the stock muffler, not the tubing.
'whatever happened to glasspacs?'

 

DELOS02GT

Founding Member

Jun 4, 2002

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Naperville, IL

www.chicagolandmustang.com

Apr 14, 2004

#8

• Apr 14, 2004

• #8

I just did the mufflers and didn't notice anything but the sound. The mid-pipe will give you the HP gain....not the mufflers.

 

T

Too Slow

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Jan 23, 2004

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Houston, TX

Apr 14, 2004

#9

• Apr 14, 2004

• #9

whenever i had the original flows welded in my 02 auto Gt i noticed an immediate gain. wasnt' much but it was there and i loved the sound.