Head changes for '99 and later???
Thread Starter
Pro
Joined: Mar 2003
Posts: 629
Likes: 20
From: Texas
Head changes for '99 and later???
Other than the new valve cover design, what else is physically different on the '99 and later head versus the earlier '97 and '98?
Will the exhaust and intake from all LS1 years bolt up to either head design?
Thanks, :flag
Racer
Joined: Oct 2001
Posts: 442
Likes: 2
From: San Clemente CA
Re: Head changes for '99 and later??? (split63)
Hi,
The late heads have smoother surfaces as-cast due to a process change. They may flow a little better in stock form. The late valve seals are one piece rather than two piece.
Steve
[Modified by SNW Vette, 10:08 PM 10/23/2003]
The late heads have smoother surfaces as-cast due to a process change. They may flow a little better in stock form. The late valve seals are one piece rather than two piece.
Steve
[Modified by SNW Vette, 10:08 PM 10/23/2003]
