Here they are, the 8k RPM rated dual valve springs!!!
Set of (12) 205# dual valve springs, 10 degree retainers, and 10 degree 11/32″ valve locks perfect for use with a War Head. These springs were successfully tested to over 8k RPM during a drag strip engine failure event and the valve train survived 100% in-tact. These springs have sufficient seat pressure to handle over 200 lbs of boost with a 1.97″ intake valve. These springs have an extremely aggressive spring rate and work well for both flat tappet and roller lifter camshafts. They will accommodate over 0.800″ lift but DLC lifters/tappets are required for flat tappet camshafts using these aggressive springs as nose pressure will exceed 500 lbs!!!