Industrial Injection 2001-2004 LB7 Duramax Ported & Polished Cylinder Heads (RH & LH Set)2001 2004 LB7 Duramax Ported & Polished Cylinder Heads (RH & LH Set) Unlock the full performance potential of your 20012004 LB7 Duramax 6. 6L with these Industrial Injection Ported & Polished Cylinder Heads. Designed for high performance applications, these fully CNC ported heads deliver increased airflow, and enhanced power capability for racers, sled pullers, and serious performance enthusiasts. Machined using Industrial Injection's state of the art
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