Includes the adapter plates, tie bar and hardware required to connect twin engines utilizing single or twin front mount outboard cylinder(s) p/n 64-826491A 1(HC5342).. Fits:. Mercury/Mariner V-6 135-200 HP (1989), 75-250 HP (1990), 75-275 HP (1991 and newer). Hi-Perf 2.4/2.5L EFI (1995 and newer)