bad95killer

You're damn lucky & i should check my buddy's tomorrow then i'll post back

peace

ShevrolayZ28

iTrader: (4)

FWIW on the passenger side my 02 Z28 has 241's, prolly on the driver's side too but I can't see the ID#.

RayZ06

iTrader: (1)

My wife's new 06 Impala SS has 243 heads.I don't think it has sodium filled valves but it has some sodium in the console from Wendy's.
Ray T

Rob

iTrader: (6)

FWIW, no '04 GTO came with 243 heads. Just plain old 241 heads.

Seems the 243 heads are on just about everything now though.

sdbrown84

iTrader: (22)

Are the LS6, LS2 heads all the same 243 castings?

Is there any difference between the LS2 and LS6 heads?

camaroextra

iTrader: (10)

Yes they are both 243's, the only difference is that the LS6 has sodium filled valves

sdbrown84

iTrader: (22)

What is the advantage of the Sodium filled valves?

ls1greyhound

They are lighter

camaroextra

iTrader: (10)

They dissapate heat faster. Which basicly means they dont absorb as much heat from the combustion chamber, so the next batch of air doesnt have as much heat radiated into it as it passes over the valve.

sdbrown84

iTrader: (22)

Don't want to hijack but do they change the compression ratio over the 241 heads?

02SOMWS6

iTrader: (6)

mine has the LS6 block but has 241 heads

allngn_c5

iTrader: (3)

That's kinda like winning a small lottery. Being faster then the next guy straight from the factory. I guess it goes to show that good things come to those who wait. I mean picking up one of the last 02's built

camaroextra

iTrader: (10)

going to check

camaroextra

iTrader: (10)

dammit

muncie21

iTrader: (14)

Don't forget the 02-04 LS6 heads have hollow intake valves (in addition to sodium exhaust) and the higher tension yellow valve springs. I want to say titanium retainers too, but I'm not sure on that one. A Z06 has a higher redline than a regular C5 due to the lighter valvetrain.

02SOMWS6

iTrader: (6)

Those parts are more hype than they are worth. When my car was stock with just a lid and headers I was at the track with a buddy that had a 02 Z06. So we lined up all day- 02 WS6 vs. 02 Z06. I beat him every time. Who leaves the stock stuff on anyway, get a set of ported heads or aftermarket heads and stop worrying about casting numbers

GuitsBoy

iTrader: (4)

I was build 11/11/2002 and I had 241s from the factory. Did I have to wait another week or what?!?

BigDaddyBry

iTrader: (15)

If part of the VIN corresponds to assembly date, could we figure out at approximately what date the switch occured? It would then be easier to find more of these out there.

Z28/2002

iTrader: (27)

Checked mine yesterday and it's got the 241 castings

NVR_SPDS

iTrader: (39)

We werent lucky enough to get the 243s, but we do have an LS6 block in our 02 WS.6