Only MAHLE can say that it is the largest manufacturer of piston rings in the world today.
Much of Mahle's piston ring technology comes from its acquisition of the Perfect Circle Companies, Perfect Circle had been making piston rings since 1921.
STANDARD SIZE ONLY, READY TO FIT, NO NEED TO CHECK GAPS AFTER INSTALLATION. Fits M28 and M28/1 engine, will not fit M4 engine. Made in Brazil.
Top ring 1.75mm, rectangular, cast iron, molybdenum coated.
Middle ring 2.0mm, taper-faced, cast iron, phosphated.
Oil ring 3.5mm, steel-rail oil control (multi piece), chrome plated.
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