Cummins 4BT/6BT/QSB/ISB

The 3920005 4BT cylinder head is heavy‑duty bare cast‑iron cylinder head for Cummins 4BT, 4BTA3.9 four‑cylinder 3.9L diesel engine. Cross Reference OE numbers：3920005, 3933419, 3966448, 3904570 3966448/3933370/3966447

following is the other models of we are produced:

The technical information is:

1. Heavy‑duty high‑strength cast iron casting, reinforced internal rib structure, anti‑crack and anti‑deformation under heavy‑load working
2. Standard 7mm injector hole design, matches 4BT /4BTA3.9 mechanical fuel system
3. Precision CNC machining on gasket deck surface, valve seats, injector bores, water‑oil passages; flat surface for perfect gasket sealing
4. 100% air‑pressure leak test before shipment, eliminate internal porosity and passage leakage risk
5. Strictly follows Cummins OE dimension standard, perfectly matches 4BT valves, valve springs, gaskets, injectors and rocker assemblies
6. Premium aftermarket quality with ISO‑9001 inspection, cost‑effective for repair shops, spare‑part wholesalers and fleet maintenance
7. Fits trucks, construction machinery and generator‑set 4BT engines

Remarks:
1).The Cylinder head kit we produced are suitable for the following Cummins models:
Engine Series: A2300, B3.3, QSB3.3, 4BT3.9, 6BT5.9, 6CT8.3, L8.9, L9.3, ISBE, ISDE,  ISC8.3, ISL9, QSL9, ISM11, QSM11, L10,  NTA855, N14, KTA19, KTA38, KTA50, QSK45, QSK60, QST30, QSX15, ISX15, VTA28, NH220, ISF2.8, IS3.8, QSF3.8, ISG11, ISG12.
2).If your need item can’t find in this list, please contact with us directly to check more information.
There is many photos and parts number can’t full show in this website.
3). We slso can do OEM and ODM ,If you have other brand require, we also can offer .
4). For any future information need or question require, please contact us to know more.