Cummins 855 Early Cylinder Head - Brand New, Loaded - 3037989

Cummins 855 Small Cam and Big Cam "Large Spring" Cylinder head. 
Please note: This cylinder head is assembled with "Large" Valve Springs, which are 1.50" in Outside Diameter. If your current head has 1.25" OD valve springs, you will need to order item 166224 instead.  
NTC250 (Small Cam), NTC400, Big Cam IV
Before ordering, please ensure that your current head has:1.50" OD Valve Springs (Large) - OE Part Number 3035996 or 3081212.1.85" Exhaust Ports (Large)5/16" injector hold-down bolts (Small) - OE Part Number 3028279.0.140" Valve Protrusion (Standard)If you are unsure, please give us a call with your 8 digit engine serial number and we will verify your build. 
Loaded cylinder head. Assembled, tested and machined in the US! This item will arrive with a full valvetrain assembly and injector cups already installed. You will just need to swap your own injectors over.  
Cylinder head casting and all components are brand new. There is no core charge associated with this item. 
Cross Reference with:Casting Numbers: 135541, 152650, 218526, 3007716, 3007717, 3041991OE Part Numbers: 3037989, 3037990, 3081223, 3261637