JE Pistons JC8A04-3445 Piston Ring Set 3.445 in. Bore 0.0472 in. Top / 0.0472 in. 2nd / 0.110 in. Oil 4 Cyl.JE Pistons JC8A04 3445 Piston Ring Set 3. 445 in. Bore 0. 0472 in. Top 0. 0472 in. 2nd 0. 110 in. Oil 4 Cyl. JE Piston Rings are designed to maximize horsepower through precision sealing of combustion pressure. They are offered in a huge selection of sizes, various materials, and in multiple thicknesses to suit a wide variety of engines. JE Pistons also offers an array of custom piston ring services including back cutting, dyke cutting, lapping,