3.9L CUMMINS 4BT

Built for durability and compact power, the Cummins 3.9L 4BT engine benefits from this range of mechanical fuel system upgrades, custom turbo kits, and performance manifolds. Whether it's for a Jeep swap, off-road rig, or marine build, these components support VE and P-pump variants with parts like governor spring kits, billet valve covers, and 4BT-specific intercoolers.

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  Colt Cams 4BT Tappet Set TAPPETS-4BT For 3.9L Cummins 4BT (set of 8)

  Colt Cams 4BT Tappet Set TAPPETS-4BT For 3.9L Cummins 4BT The Colt Cams 4BT Tappet Set is a great upgrade for the valvetrain in your 3.9L Cummins 4BT when adding a performance camshaft. Inconsistencies such as flat and even dished crowns on the tappets...

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  Now: $110.00

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