2010 - 2015 Camaro Technical Discussion All 5th Generation Camaro technical discussion that doesn't fit in other forums

l99 to ls3 swap question???

Old 05-09-2018, 09:58 AM
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l99 to ls3 swap question???

previos owner says he did the swap from l99 to ls3? but how can i tell from a visual inspection??? thanks for any help.
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Old 05-09-2018, 11:12 AM
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Re: l99 to ls3 swap question???

I am mostly ignorant to the newer Camaro's, but it looks from brief reading that the L99 came with automatics, where the LS3 came with manuals.

Camshaft Upgrade - Too Fine L99 - GM High-Tech Performance Magazine

I am not sure you can really call it a swap. Look at the differences listed in the article. To make it an LS3, there would have had to have been a cam swap, changes to the heads, and unknown changes to the computer to disable the AFM and VVT components.

If you still have contact, I would verify what was actually done.
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Old 12-30-2018, 11:40 AM
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Re: l99 to ls3 swap question???

I think he was taking about a cam swap and supporting valve train to get rid of the VVT and AFM which needs a tune to to get rid of them.

In the 5th Gen world listed above is a "LS3 swap."
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Old 12-30-2018, 11:47 AM
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Re: l99 to ls3 swap question???

L99 and LS3 are the exact same on the outside EXCEPT for the timing chain cover.
L99 has a phaser cam location and the LS3 does not.

If you have a regular timing cover as pictured on the right it could be a LS3 or a L99 with a cam swap basicly.

Last edited by 383z93; 12-30-2018 at 11:59 AM.
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Old 12-30-2018, 11:57 AM
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Re: l99 to ls3 swap question???

The ONLY way to know is to take off a head and see if the pistons have Valve reliefs for VVT.
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