Mallory Aftermarket Mercruiser Riser Mount Kit

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