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This is a custom Mercury V6 powerhead studs kit for Mercury Racing 15" and 20" ROS Smooth-Back and Ridge-Back mid-sections with a One-Piece Tuner Plate. Select your Tuner Plate on the drop-down at check out or call with questions.


Made with high-quality 190,000 psi tensile strength chromoly with a durable black oxide finish that should be lightly coated with grease when dropping on your powerhead.


These powerhead studs have a super convenient broached Allen Head end for easier installation and removal from the block.


Includes eight (8) Mercury Powerhead Studs sized for the ROS Mid Sections, eight (8) case-hardened thick-washers to fit the nut seats cast in the mid, and eight (8) stainless steel nylock nuts.


Non-broached Mercury part numbers are 8M0034437, 847532, and 96910 for one stud.


Contact Mike Hill at or 714-697-1716 with any questions.

Mercury ROS 15" & 20" Mid Powerhead Studs Kit

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