I've got an LH6 with the 243 heads. The heads are off the motor. I also have a set of 243 heads off an LS4. I don't know which heads are off which motor.

In the LH6 specs post it says the LH6 also uses the solid Silcrome 1 valves originally introduced on GM Powertrain’s LS1 V-8.

is there any way to determine which valves are the LH6 and which are the LS4? I'd like to keep the like valves together. Or does it matter? Are they any better?

The motor is going to have a turbo.

thanks

Bueler.

Thank you.