questions about head runner size





TSP has PRC 5.3l heads for sale . the runners are 218 and come with 10.8:01 compression. $1400.00
AFR heads are 205 runners. great head. nothing more needs to be said about them.
what size runners does the stock LS1 and LS6 have?
explain how the runners effect the RWHP and TQ
I know AFR is the best head, but that's not what im looking for here.


