What is the difference between the ls6 and ls1 head. Can you tell by just looking at it?

A local mechanic is selling a set of stock LS6 heads but the heads look almost the same as my stock 98 heads. The only difference I can see is that the valve cover screws in differntly. But I know that the 97-98 valve covers were also changed in 99+ heads.

How can I make sure that the heads he is selling are LS6 or 99+ LS1 heads. If anyone has picture that would help allot.

 

Ls6 heads have a (D)port for the exhaust, where as the LS1 have a circle exhaust port.

 

Also I beleive the compression is higher for the ls6 heads.

 

What about the valves? Are they larger or the same valves as the LS1?

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by BLMONGOOSE:
<strong>What about the valves? Are they larger or the same valves as the LS1?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I think the valves are bigger but I am not sure.TTT for you.

 

No, the valves are the same as a regular LS1 (2.00/1.55).

 

You'll be able to tell from a glance by looking at the exhaust port.

O vs D

J.

 

Just as additional FYI, there is a lot more to the LS6 heads than just the exhaust D port.

This will give you a full explanation:

2001
http://idavette.net/hib/ls6/INDEX.HTM

2002
http://idavette.net/hib/02ls6/index.htm

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<small>[ June 09, 2002, 07:33 PM: Message edited by: kewlbrz ]</small>