Nostalgia TF Stage I 426 Hemi Cylinder Heads – 2.375″ x 1.925″ valve dia. Iron valve seats, 3/8″ Exhaust valve guides, 1/2″ Bottom row head stud inserts & .025″ Jr. Hoops. 4.187″ dia Chambers. (pair)

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)