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2 1/2" Muffler chokes to 2"

Forum: C3 HVAC, Fuel, Emissions, and Exhaust

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2 1/2" Muffler chokes to 2"

Posted: 10/26/08 5:37pmMessage 1 of 7
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Oklahoma City, OK - USA
Joined: 4/1/2007
Posts: 432
Vette(s): 1972 LS5 Convertible,Auto.Targa Blue with Black Interior.
I hung my new Exhaust system from Corvette Central under the car and drove to the Muffler shop and had him make the connection to my headers. I bought the original 2 1/2" system and I don't think I'll leave these stock mufflers on very long, it's just to quiet. My question for you guy's is why my 2 1/2" system is choked down to 2" at the back of the muffler. This makes no sense to me.
Lonnie
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2 1/2" Muffler chokes to 2"

Posted: 10/26/08 5:50pmMessage 2 of 7
r
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williamston, NC - USA
Joined: 1/19/2006
Posts: 353
Vette(s): 1969 coupe, 350, m22 trans, ac, black on black,
 I have a chambered exhaust on my 69, sounds sweet,,,just 4 get the radio, rd
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2 1/2" Muffler chokes to 2"

Posted: 10/27/08 11:02amMessage 3 of 7
V
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Mounds View, MN - USA
Joined: 5/24/2007
Posts: 1034
Vette(s): 70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe
They correctly should neck down to just over 2 1/8".  The theory is that the exhaust has cooled a bit so needs less room.

Larry
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2 1/2" Muffler chokes to 2"

Posted: 10/27/08 11:16amMessage 4 of 7
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Oklahoma City, OK - USA
Joined: 4/1/2007
Posts: 432
Vette(s): 1972 LS5 Convertible,Auto.Targa Blue with Black Interior.
Thanks Larry, I guess that does make sense. I just thought it was kind of odd.
Lonnie
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2 1/2" Muffler chokes to 2"

Posted: 10/27/08 12:26pmMessage 5 of 7
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COPPERAS COVE, TX - USA
Joined: 7/6/2002
Posts: 475
Vette(s): 1972 corvette stingray convertible 2007 coupe
they also started with the 2" and opened up to the 2 1/2 at the manifold, thats how mine are.
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2 1/2" Muffler chokes to 2"

Posted: 10/27/08 9:46pmMessage 6 of 7
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Burke, VT - USA
Joined: 1/23/2002
Posts: 7602
Vette(s):
SOLD - "The Toy" - '70 Convertible
SOLD - "The Beast" - '90 ZR-1 (#682)
SOLD - "Betty" - '28 Ford Model A Tudor
SOLD - "BLKBRRD" - '78 Pontiac Trans Am
"BLUBYU" - '04 Coupe
When I replaced the pipes and mufflers several years ago on "The Toy" I left the original 2" exhaust manifolds on but went with the pipes that opened up to 2 1/2".  All of the mufflers I looked at had 2 1/2" inlets but only 2" outlets.  Couldn't find any tailpipe tips that were 2 1/2" anyway.
 
But I'm happy with the sound - not too soft at idle and just the right (for me) roar at WOT.

Jim Olson 

"The Toys"...!!!  Save the Wave!

Where I've been in a Corvette...!!!

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2 1/2" Muffler chokes to 2"

Posted: 10/28/08 6:38pmMessage 7 of 7
a
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Orillia, Canada
Joined: 6/23/2008
Posts: 558
Vette(s): 1972, 1980
You can expand the end of the pipe to 2 1/2 to use a larger inlet muffler if you like, I use the magna flow...nice growl at idle and good bark when you get on it
John
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