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Old 04-06-2014, 08:30 PM   #1
OKGMC4
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Join Date: Oct 2009
Location: Broken Arrow, OK
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Anyone using Doug Thorley 323Y-C headers?

I see most people get the 324Y-C headers that are 1 5/8 primary and 3" collector but they make a 1 7/8 primary with a 3" collector under part number 323Y-C. Seems like most of the LS engines (LS1, LS2, etc.) like the bigger pipes so it would make sense that a 6.0 or modified 5.3 (cam and ported heads) would work well with these. Any thoughts? I'd really like to see how they fit in the frame.
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