7/16″ NC Inner Head Stud Insert w/ 5/8-11 external thread, 1.500″ OAL w/ 5/8″ Hex head. For Muscle heads only (each)

Muscle Head Stage V: Program V2-P8-F12, 2.490″ x 2.020″ valve dia, 104cc chambers. Std Copper intake valve seats, B5 Exhaust valve seats, .025″ Jr Hoops & All 9/16″ Head stud inserts. 2.600″ lifter spread, 12ø Exhaust Flange. (pair)