CamaroZ28_LS1

iTrader: (5)

799 are truck heads as far as I know... 6.0L engine. Not sure what vehicle.

bene

iTrader: (16)

They are also came from LS2 corvette engines.

Fastdriver1992

iTrader: (1)

false im not sure of the years but ik that my 2003 Z06 motor came with yellow springs

kevmac

iTrader: (1)

these "truck" castings have the same combustion chambers as the vette? I've seen 243's for sale off 6.0 and 5.3's

JonCR96Z

iTrader: (33)

799s did not come on any 6.0s except for the LS2. They only came on 4.8s and 5.3s in the trucks.

01ssreda4

iTrader: (96)

This is correct.

Head Hunter

iTrader: (14)

So the 2007 Silverado (6.0) wouldn't have them, but the 2007 Tahoe (4.8 and 5.3) would?

JonCR96Z

iTrader: (33)

That's right. The new 6.0s have L92 heads on them and the older 6.0s had 317s. And the new 4.8s and 5.3s either have 799s or 243s.

kevmac

iTrader: (1)

ls2 had 243's and it was a 6.0 correct? I just was asking if all the cc's were the same.

JonCR96Z

iTrader: (33)

Uh, yeah.


The 799 and 243 are virtually the same head.

luigiandme

iTrader: (2)

Correct. There are guys out there that have Bank 1 with 799 and Bank 2 with 243 on their LS6/2's! But yes, the LS2 uses both 799 and 243 and is indeed a 6.0. Mostly 243's. My TBSS has 243's on both banks.

02*C5

iTrader: (1)

I would say this if you can get a set of 243 with the light weight valves you hit gold they are harder and harder to find since the valves have been discontinued by GM. I believe in a few years these valves alone are going to be worth more than the heads they came in.

david vericker

iTrader: (1)

That is correct. The 2002/2004 LS6 243 heads came with the yellow valve springs rated at .570 lift. The lighter sodium filled and hollow valves in the 02/04 243's do not make for much of a HP gain,but they do provide additional valvetrain stability at higher rpm's...that was really the whole intent of the lighter valves for the LS6.

JonCR96Z

iTrader: (33)

Not all the LS6 243s had yellow springs.

david vericker

iTrader: (1)

"WRONG" Which corvette 2002/2004 LS6 243 heads with the hollow and sodium filled valves didn't have the yellow spring??? The blue valve springs are rated at .540 lift and are for the LS6 .525 lift cam...not the 405 hp .550 lift 2002/2004 corvettes.

01ssreda4

iTrader: (96)

The GTO 243s didn't get the yellow springs did they? or at least the 04s shouldn't have. That still would have been an 04 LS6 block.

redbird555

iTrader: (14)

I believe so every set of 243s i've seen has them. The ls2 uses the 01 ls6 cam specs so it would atleast use the blue springs however gm no longer uses those so I'm 99% sure they do use the yellows.

JonCR96Z

iTrader: (33)

I have an LS6 in my 04 CTSV that never had yellow springs.

02*C5

iTrader: (1)

The LS6 cam is 204/218 @ .050 .550lift w/ 117.5-LSA and the stock GTO cam is 196/207 @ .050, .479/.467 lift w/ 116 LSA If I remember right but then again I could be wrong. Its been a few years

edit: I think they went to the ls6 cam in 06 after the Z went with the 427.

Ls1Rook

iTrader: (1)

I came across some 799 heads, they said there from an 03 5.3 and some 243s which said to be from a 08 5.3 .. I can get either one for about 300, maybe less. Which ones should i get?