Piston Rings Set

These are the same or better than OEM! These are Riken Rings!! They will fit OE style Cast pistons…will not fit Wiseco Pistons!

Standard Bore size is 3.6265″

If you need pistons for this engine we carry those too!

Sold by the Pair (2 rings for one piston)

These rings are usually available in STD Bore, .010″, .015″, .020″, .030″ and .040″ Oversize. 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.

Fits:

Mercury / Mariner

200-250hp 3.0L DFI Optimax

Replaces:39-834805A12, 39-858772A12, 39-875252A12, 39-875257A12