01-04 GM 6.6L Duramax Ported Cast Iron Cylinder Head (One) LB7 Pacific Performance Engineering Bump Stops|Suspension If you have an aftermarket

If you have an aftermarket fuel filtration system such as an Air Dog or a FASS

The charge air intake temperature sensor used on Cab and Chassis applications varies from pickup truck applications and will not fit

Optimized core design for enhanced coolant flow distribution

you will only use one (1) of the included thermostats when replacing your bypass thermostat

68357482AB

01-04 GM 6.6L Duramax Ported Cast Iron Cylinder Head (One) LB7 Pacific Performance Engineering Bump Stops|Suspension If you have an aftermarketThe OEM Duramax cast aluminum cylinder heads fall short over time the differing heat expansion rates between the cast iron engine block and cast aluminum cylinder head cause head gasket scrubbing and eventually blown head gaskets. The aluminum cylinder heads are also prone to warping, melting, and or cracking in high performance applications where excessive heat is introduced. PPE's new ported LB7 Cast Iron Cylinder Head is the ultimate upgrade for