Cummins 4BT 3.9L & 6BT 5.9L Piston & Ring Kit (.50mm Oversize) – Replaces 3802132, A77731

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This is a brand-new piston and ring kit for Cummins 4BT 3.
9L engines, with a .
50mm oversize.
It directly replaces part numbers 3802132 and A77731.
Made in the United States, this kit includes everything you need for a rebuild – pistons and rings sized for that extra bore clearance.

Great for diesel mechanics or anyone keeping their Cummins running strong.


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FREE In store & Online Returns If for some reason, you're not 100% satisfied with your purchase, you can return or exchange quickly and easily in accordance with our Return policy. Some restrictions may apply.
PRICE MATCH Guaranteed FABIENNECONRAD.COM will gladly match the price on a qualifying item sold in store or online at a qualifying retailer. See details














