cguth

iTrader: (3)

I bought a used vette that is suppose to have some head work done. I was just trying to find out if I have stock castings on it still.

evo462

iTrader: (27)

933 97 aluminum perimeter bolt 5.7
806 97-98 aluminum perimeter bolt 5.7
853 99-00 aluminum center bolt 5.7
241 01-03 aluminum center bolt 5.7 (some late MY00 cars got 241 castings)
243 04 up LS6 aluminum center bolt 5.7 ***These castings were also used around 05 in truck applications***
862 99 and up 4.8-5.3 Truck heads
706 99 and up 4.8-5.3 Truck heads
799 05 and up 4.8-5.3Truck heads ***reportedly came on a few corvette's too*** These are basically 243 Heads
873 99-00 LQ4 6.0 Iron center bolt heads
317 01 and up LQ4 and LQ9 6.0 aluminum center bolt heads
035 01 - 04 LQ9 6.0 aluminum center bolt heads

cguth

iTrader: (3)

damn that is some good info. ive seen that but i was not sure if that was for all ls1's or just camaros. thanks

evo462

iTrader: (27)

Yeah I'm not 100% sure they didn't do something different with Corvettes but this is just what I found for the LS series in general. I would say unless they have 799 or 243 casting heads, at most it was reworking the stock heads somehow.

cguth

iTrader: (3)

Yea I just looked and it has 853. So im on the look out for some 243's. But on the bright side while researching the heads I found that I do have an ls6 intake. Great surprise for me

dr_whigham

iTrader: (49)

2004's got 241's as well, not 243's. Only the CTS-V's and the Z06's received 243's.

cguth

iTrader: (3)

from what i understand the only difference between 241 and 243 is the sodium filled valves, is that correct?

Exeodus

iTrader: (1)

No, 243's flower better than 241's. 243 was the LS6 head but was also used on the LS2.

cguth

iTrader: (3)

Thanks for the info. Im thinking about ordering some from texas speed

evo462

iTrader: (27)

You might ask them about the PRC 225 as-cast heads if you're looking at the stage 2.5 LS6 heads from them. I think theyre about $100 more but flow a little better.

cguth

iTrader: (3)

Thats exactly what I was looking at. Ill just have to call and see what they recommend. I would like to make close to 500 at the tires n/a and hit it with a 200 shot. Its not my daily so cam drive ability isnt a huge concern. More of a weekend car.