I would say 1100 hp is capable from a ON KILL 450ci P7 in Bretts Hands.
P7 heads done by Slawko w NO welding are capable of 440cfm @ 1" of lift.
As for a ALL $ No Object Big ci w8 or 9 1050 is MAX by ANYONE.

Last edited by fishy340; 04/06/18 07:01 PM.