LS6 or LS2 head ID.

Reply Subscribe

Thread Tools

Search this Thread

Mar 22, 2007 | 06:15 AM

chopper

Thread Starter

On The Tree

iTrader: (18)

Joined: Dec 2006

Posts: 100

Likes: 0

LS6 or LS2 head ID.

I hope this isn't a topic covered countless times but I haven't been able to find the answer yet.
Iam to understand the LS6 and the LS2 both used the 243 heads how can I tell the difference?
I would think the LS6 head would be the more desirable one due to the lighter sodium filled exhaust valves. Correct?
Thanks for any help on this, Carl.

Mar 22, 2007 | 07:32 AM

BC Bob

Teching In

Joined: Mar 2007

Posts: 4

Likes: 0

From: Charlotte

Quote:

Originally Posted by chopper

I have an '07 Corvette with an LS2. Head casting number is 799. Not sure what that means, but it's down on power at the dyno.

Mar 22, 2007 | 02:01 PM

Krab

TECH Addict

iTrader: (28)

Joined: Sep 2002

Posts: 2,170

Likes: 1

From: Central Texas

Both the LS6 and LS2 heads are 243 castings. The only difference is the valves they are equipped with and the valve springs. LS2 heads come with regular valves while the LS6 heads come with LS6 springs and the lighter valves like you mentioned. If you buy just the 243 heads (either LS6 or LS2), then buy a set of the lighter valves, and some good valve springs, you've got "an LS6 head".

Mar 22, 2007 | 05:24 PM

chopper

Thread Starter

On The Tree

iTrader: (18)

Joined: Dec 2006

Posts: 100

Likes: 0

I bought a new set of 243's assembled, now I want to know if they are LS2's or LS6's. They have yellow springs if that helps. Thanks for the replies! Carl.

Mar 23, 2007 | 10:11 AM

12secSS

TECH Junkie

iTrader: (30)

Joined: Nov 2001

Posts: 3,690

Likes: 1

Yellow spring means LS6 springs, sounds like you have LS6 243 heads.

Mar 23, 2007 | 01:20 PM

exSSer

Launching!

Joined: Feb 2006

Posts: 270

Likes: 0

My LS6 (02 ZO6) came with pink paint on the springs.

Mar 24, 2007 | 06:31 AM

chopper

Thread Starter

On The Tree

iTrader: (18)

Joined: Dec 2006

Posts: 100

Likes: 0

Thanks everyone for Your replies. I feel I might just have LS6 heads!? If I were to pull a valve out is there a weight for the LS 6 valve so I can be certain? Thanks again for all the input! Carl.