For engines with the following CPL numbers: 591, 681, 721, 725, 843, 895, 981, 1172, 1259, 1312, 1522, 1932.

At Diesel Pro, we focus on getting you superior quality parts at prices that are better than other suppliers. This Cummins 4B, 4BT and 4BTA rebuild kit is built to our exacting specifications, which is why we back it with our leading one year warranty. In other words, we only sell parts that are designed to last, and know that once you try us, you will be satisfied. This inframe kit (also called an overhaul kit) will work with 4B3.9 , 4BT3.9 and 4BTA3.9 engines.

For use in engines with one-piece pistons that are standard size, with a compression ratio of 17.3 : 1.

This premium rebuild kit includes the following:
• Pistons
• Piston pins
• Piston pin retainers
• Piston ring sets
• Connecting rod shell sets
• Crankshaft shell sets
• Upper (head) gasket set
• Lower gasket set