stock exhaust diameter?

Discussion on fuel delivery & intake/exhaust tech & mods.
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lacamaro
Posts: 9
Joined: Mon Jul 23, 2018 1:09 pm

stock exhaust diameter?

Post by lacamaro »

2"? 2.5"? or 3"
Ordering an electric cutout for stock exhaust until i can afford Kooks exhaust system.
Thanks!
2011 PPV wrecked/selling whole or parts
2012 PPV Race car
2013 PPV Street Nymph
1964 Cadillac coupe slow ride
1973 Z28 StreetZilla
2005 Dodge Cummins tow ride
Los Alamos, New Mexico 87544
lastcall190
Posts: 604
Joined: Mon Sep 11, 2017 5:17 am
Location: North Jersey

Re: stock exhaust diameter?

Post by lastcall190 »

I believe none... 2.25" IIRC. If nobody can confirm that by the time I get home I'll measure the one I just removed.

-J

EDIT: Maybe this helps... look likes both are used at different points

http://newcaprice.com/forum/viewtopic.php?f=16&t=121" onclick="window.open(this.href);return false;
2012 Caprice
2008 CVPI

Both gone but not forgotten...
xcidmigs
Posts: 783
Joined: Fri Feb 13, 2015 8:12 pm
Location: SE PA

Re: stock exhaust diameter?

Post by xcidmigs »

its 2 1/4" for most tubing except for some parts that are inside the various joints that necks down to like 1 7/8. You can eliminate a large restriction like that by just chopping out that center suitcase looking muffler for either straight pipes or bullets etc. I put a magnaflow X flow muffler in the middle there and have stock mufflers in back, its very quiet still. The front OEM cat pipes are still restricted but to replace that all is a big project or big $$$

Try the Badlanz versions in "low profile" made in USA and stainless. I just bought some and am going to put them in right at the 90 degree turn by the rear diff.
lacamaro
Posts: 9
Joined: Mon Jul 23, 2018 1:09 pm

Re: stock exhaust diameter?

Post by lacamaro »

2.25 eh? Kinda small for a v-8.... hmmm well crap! lol, i will have to call in a favor at the muffler shop! ha...
Thanks guys....
2011 PPV wrecked/selling whole or parts
2012 PPV Race car
2013 PPV Street Nymph
1964 Cadillac coupe slow ride
1973 Z28 StreetZilla
2005 Dodge Cummins tow ride
Los Alamos, New Mexico 87544
lastcall190
Posts: 604
Joined: Mon Sep 11, 2017 5:17 am
Location: North Jersey

Re: stock exhaust diameter?

Post by lastcall190 »

Oh no doubt. When I removed it I fired up the dumped x pipe partway through the exhaust install. I laughed at how jeckyl and hyde the car became in that moment.

-J
2012 Caprice
2008 CVPI

Both gone but not forgotten...
CrashTestDummy
Posts: 2300
Joined: Sat Feb 07, 2015 2:31 pm
Location: Pearland, Texas

Re: stock exhaust diameter?

Post by CrashTestDummy »

lacamaro wrote:2.25 eh? Kinda small for a v-8.... hmmm well crap! lol, i will have to call in a favor at the muffler shop! ha...
Thanks guys....
2.25” isn’t nearly as bad as the 1-7/8” inlet for each front cat. :shock:
Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2018 Tahoe PPV (her car)
1995 DGGM Impala SS
1985 Firebird - 310 LS1 C Prepared autocross car.
1980 Bluebird Wanderlodge
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kevink
Posts: 480
Joined: Sun Aug 09, 2015 12:55 pm

Re: stock exhaust diameter?

Post by kevink »

From exhaust manifolds to mid muffler: 2.25"
From mid muffler to resonators: 2.0" (driver side is squished to 1.75").
From resonators to mufflers: 2.25"
Tailpipes: 2.25"
2011 9C3: 11.48 @118.
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