M-H Stg V Cyl Hd O-Ring Kit (for pair of C-H). Includes Large #152 o-rings for: Int ports (8), Deck oil O-rings,Spark plug tubes (16), 10ft of .103″ Cord. (kit)

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)