Boat Marine Bow Rail Fitting Rectangular Base Hardware 4" Vintage 90ºdeg 7/8" 25hp and the 42259-C have 5-holes

and the 42259-C have 5-holes would be applicable to the late 80's and early 90's V-Engine boats that use the 4" Y-pipe

MerCruiser Exhaust Manifold Riser (You get the PAIR as pictured)

OMC Stringer V6 / V8 800 Sterndrives (1978-1985)

People tend to order this by mistake to replace the 7" pulley (please don't be one of those people)

This would have been found on MerCruiser 3

Boat Marine Bow Rail Fitting Rectangular Base Hardware 4" Vintage 90ºdeg 7/8" 25hp and the 42259-C have 5-holesItem Details 90 Degree Aluminium About 4" Fits 7 8" OD Tube Tubing (this is for the standard and most common size bow rail) Set of 4 You will receive this set or one that is in the same or better condition. This one uses set screws included for installation Please inspect pictures closely for condition. These are used and may have some pitting. If we are out or you need more then we have listed please ask we probably have more of these. Possible