All LS6 Heads Have Yellow Springs?

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07-17-2008, 05:00 PM

LS1GMCTruck

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All LS6 Heads Have Yellow Springs?

Looking at some LS6 heads that have never been apart & they have "blue" springs? Off a 2001 ZO6 Vette. Thought they all had yellow springs? Thanks for your input guys...

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07-17-2008, 05:07 PM

floman

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01s had blue springs, and 02 up had the yellow springs. The 01 heads have solid valves, and the 02 up have the hollow stem and sodium filled exhaust valves for about a 25% weight savings on the valves.