05-30-2013, 03:04 PM | #1 |
Drives: 2011 2SS Synergy Green Join Date: Nov 2011
Location: Austin, Texas
Posts: 3,670
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L99 and LS3 stock exhaust manifolds are the same?
I'm 99% sure but I need to know if the stock exhaust manifolds are the same. I know the catted extension isn't exactly the same.
The L99 catted mid-pipe will work on an LS3 but the LS3 will not fit very well on an L99 but is doable.
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L99 With a Maggie
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05-30-2013, 04:02 PM | #2 |
Drives: 2013 1SS Join Date: Dec 2012
Location: New Jersey
Posts: 716
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IIRC, the only difference is the L99 midpipe has a flexible section, whereas the LS3 pipe does not. Otherwise I think they are the same geometrically.
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05-31-2013, 12:59 AM | #3 |
Drives: 2011 2SS Synergy Green Join Date: Nov 2011
Location: Austin, Texas
Posts: 3,670
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Yeah that's what I remember reading. I can use the flexible L99 pipes on an LS3 but not easily the other way around.
Manifolds should be identical.
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L99 With a Maggie
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05-31-2013, 12:02 PM | #4 |
Master ASE, GM, LSX Tech.
Drives: 2010 Camaro SS Join Date: Oct 2012
Location: Austin, TX
Posts: 1,034
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The manifolds are the same.
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05-31-2013, 12:30 PM | #5 |
Drives: pleather and Chiclets Join Date: Mar 2012
Location: a line somwhere
Posts: 4,206
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my pipe wasnt flexable on my L99
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05-31-2013, 12:37 PM | #6 |
Let's go Rangers!
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Really? 1st I've heard of that. All the L99 cats should have a flexable part.
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05-31-2013, 12:41 PM | #7 |
[COTW 5/12/14]
Drives: 2012 CRT NF Cammed 2SS/RS For Sale Join Date: Oct 2011
Location: NOLA
Posts: 6,115
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I had a flexible joint between my manifold and cats when I took them off to install headers.
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05-31-2013, 01:58 PM | #8 |
Drives: pleather and Chiclets Join Date: Mar 2012
Location: a line somwhere
Posts: 4,206
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if i can dig them out of my parts collection I will take a picture. There has been wierder on my car so it would not surprise me
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05-31-2013, 02:37 PM | #9 |
Drives: 2010 SS , 1970 Z-28, 2002 Avalanche Join Date: Aug 2009
Location: Michigan
Posts: 2,524
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Why are you asking???? Do you need a set? I have my stock ones, manifolds and cats, looking to sell. PM me if you are interested.
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