9-40578 - Aftermarket Mercruiser Riser Mount Kit
For: Mercruiser GM V-6 229 & 262 cu. in. (models 185 & 205)
For: GM Small Block V-8 305-350 cu. in. (models 200, 228, 230, 260 & 898)
For: GM Big Block V-8 454 cu. in. (models 330, 340 & 7.4L)
Replaced by - OS4354-MK, 18-8505
