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The Mahle drop-in piston ring set for a 4.040 in bore includes 1.0 mm top and second rings and a 2.0 mm oil ring. Supplied as direct-fit drop-in rings, they restore sealing and control oil consumption during engine rebuilds or piston replacement. Confirm the 4.040" bore and the specified ring sizes to ensure correct ring gap and an easy installation without extra machining.
Mahle MS 4.040in 1.0mm 1.0mm 2.0mm Drop In Rings
