Z06 LS6 VS GTO LS6 Heads
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Z06 LS6 VS GTO LS6 Heads
They have the same casting #'s 243. But the Z06 has the D shaped exhaust runners and the 243's off the GTO are O shaped. I read that the D shaped runners are a better performer than the O shaped off the GTO.Is there a difference ? And if i get a set off a GTO will it be worth it? Or get a set off a Z06.
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The GTO castings also have the D shaped exhuast ports. Usually, you can't tell because the exhaust manifold is circular and the black carbon covers the "d" portion.
The only difference between the two are the exhaust valves. True Z06 heads would have sodium filled exhaust valves. Springs in the 2002-2004 are rated to .550 lift, where LS2 are rated for .525.
The only difference between the two are the exhaust valves. True Z06 heads would have sodium filled exhaust valves. Springs in the 2002-2004 are rated to .550 lift, where LS2 are rated for .525.
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This is the 4th time i have seen this on Ebay. And it was a clear picture of the exhaust.It must be the carbon. Thanks!!
Last edited by COPOSS; 12-30-2007 at 12:01 AM.
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you guys are all right,heads themselves identical except for the hollow intake valves and sodium filled exhaust valves on the z06....But here somthething else..The z06 valves are also a little longer which means they reguire different length pushrods then any other head.I cant remember how much longer.
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I remember reading something about that on here. I'm using the same pushrods I got in my Thunder Racing cam kit for my LS1 in my LS6. Seems to be working real nice and no extra noise or anything. Something to research, I'm not too concerned with it myself.
Larry
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you guys are all right,heads themselves identical except for the hollow intake valves and sodium filled exhaust valves on the z06....But here somthething else..The z06 valves are also a little longer which means they reguire different length pushrods then any other head.I cant remember how much longer.
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Just so LS1W66 has all the info...it is true you can run the cams in an LS1 but you should also alter the pushrod length to accomodate. The base circle is .050" smaller which is significant. By putting the later LS6 cam in an LS1, you should run a .025" longer pushrod. Some do, some don't.
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Just so LS1W66 has all the info...it is true you can run the cams in an LS1 but you should also alter the pushrod length to accomodate. The base circle is .050" smaller which is significant. By putting the later LS6 cam in an LS1, you should run a .025" longer pushrod. Some do, some don't.