redtail2426

iTrader: (10)

I just got a set of brand new ls6 243 heads complete.They have the yellow valve springs in them but the valves are not hollw stem valves.The regular valves were on the 2001 ls6 engines but with blue springs, and the hollow valves are on the 02 and up engines with yellow springs. so you see something is not adding up and dont know what i got here.

Rob

iTrader: (6)

Maybe LS2 heads.

redtail2426

iTrader: (10)

ls2 heads are # 825 not 243,They are ls6 heads but the springs and valves are whats fishy

Beast96Z

iTrader: (21)

I believe GM only uses solid valves now. They probablly had some 243 castings left, but assemblled them with LS-2 parts.

DONAIMIAN

iTrader: (18)

Yup, theyre known for mis matching parts. Just like with the seatbelts on some of the 00 and up cars.

Rob

iTrader: (6)

LS2 are most definitely 243 heads. Just no hollow valves.

redtail2426

iTrader: (10)

interesting, they even used yellow springs on the ls2?

Rob

iTrader: (6)

They should be orange but I haven't seen the valve cover to confirm. I'll see if I can get that info.

redtail2426

iTrader: (10)

i found a post by another guy that had a ls2 crate motor and it came with 243 heads and yellow springs.so it seems some of them did.

Rob

iTrader: (6)

With GM changing the spring/color all the time, it could be many...

Sounds like that's what you got so you should be good to go. Curious to see how the results go with the GT2-3.

redtail2426

iTrader: (10)

yeah i am going to have them ported by bo white and put them on when i do headers.The gt2-3 should be sick with it.I will let everyone know next year.the gt2-3 is nice as it is.