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The Mahle drop-in piston ring set for a 4.000 in bore includes 1.5 mm top and second rings with a 3.0 mm oil ring. Supplied as direct-fit drop-in rings, they are intended to restore sealing and oil control in rebuilt engines or when replacing pistons. Match the 4.000" bore and the listed ring thicknesses to ensure proper ring gaps and straightforward installation.
Mahle MS 4.000in 1.5mm 1.5mm 3.0mm Drop-In Rings
