Description
Piston Rings
These are the same or better than OEM! These are Riken Rings!
These rings are intended for OE style cast pistons. Cannot be used on Wiseco pistons!
Standard Bore size is 3.501″
Our pistons are sold with the rings included, so if you need the piston also see the “Related Products” tab.
Sold by the Pair – 2 rings for one piston
Fits:
Mercury / Mariner
150 / 175hp 2.5L Optimax DFI (s/n OT178500-Up)
To order, select your desired options, then enter the quantity and click “add to cart”. Most standard and oversize rings are in stock however some sizes may be on a short backorder from time to time. Please don’t hesitate to contact us for assistance.
Replaces: 39-877544A12, 39-878106A12
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