what is the stock compression of an LS motor?

what is the compression of an LS motor with CTR pistons?

Thanks

 

im pretty sure that the stock compression on an ls block with ls head is 9:5:1 but not positivly sure. My gsr is 10:0 and ls's have a lower compression and can handle more boost and im pretty sure its 9:5:1. Not sure what it would be with ctrs

 

http://www.c-speedracing.com/h...c.php