M-H Stg IV+V Cyl Hds Fuel & Oil Port Plug kit. Incl: 4ea #4 AN & 4ea #8AN BH plugs w/ o-rings, 8ea Oil Blanks, & 4ea 1/4-28 Set screws. (1set per pr hds) (kit)

Muscle Head Stage V: Program V3-P1-F12, 2.450″ x 1.900″ valve dia. 102cc chambers. Std Copper intake valve seats, B5 Exhaust valve seats, .025″ Jr Hoops & 9/16″ Head stud inserts. 2.600″ lifter spread, 12ø Exhaust Flange. (PLR only)(pair)