A 4BT crank cut 0.50 mm undersize on the mains needs the thicker set. Clevite MS-1718P-.50MM is the P-series set for that grind.

• Series: P-series is the Clevite tri-metal bearing, steel-backed with a copper-lead overlay, and it is the replacement shell rather than the H-series piece.
• Size: 0.50 mm undersize, for a journal ground 0.50 mm under standard (about 0.020 inch). A standard journal will be too tight.
• Part number: Clevite MS-1718P-.50MM.
• Fitment: 3.9 Cummins 4BT, 1989-1998.
• Does not fit: A standard crank, a 0.25 mm grind, or any 5.9 main set.
• Not in the box: Rod bearings, pistons, and rings are not in this set. Order thrust washers separately if the engine needs them.

Order today to secure your replacement. Measure the crank journal and confirm standard versus undersize before you install it.