piston identification

[pagilman]

Hi, can someone identify these pistons? I have never seen them before with a circle cut in the center of the flat top? Are they a particular brand? Is any one familiar with them? They are .30 over 340 pistons with floating pins. Thanks Walt:read2:

 

[BJR Racing]

They look like L2316F's TRW's, this let them know where center was, so it was a locating tool also for the machine to read for locating the valve reliefs.

 

[pagilman]

BJR, I tip my hat to you as your the only one who could identify them, thanks for the input,WALT:cheers:

 

[BJR Racing]

Well lets say thats what they look like and without the piston being in hand theres no definite answer, but thats what they look like. As I ran many a set of them.