01-04 GM 6.6L Duramax Ported Cast Iron Cylinder Head (One) LB7 Pacific Performance Engineering Bump Stops|Suspension you will only use one

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

5 in steering wheels

replaces stock or a shimmed pressure relief valve

68357482AB

experience the highest coolant temperatures

01-04 GM 6.6L Duramax Ported Cast Iron Cylinder Head (One) LB7 Pacific Performance Engineering Bump Stops|Suspension you will only use oneThe 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