2001–2004 LB7 Intercooler Pipe and Boot Kit 3" Aluminum FitsLB7 Intercooler Pipe & Boot Kit 3" Aluminum Fits 20012004 6. 6L Duramax (LB7) High flow intercooler pipe and boot kit for 20012004 LB7 Duramax trucks. 3" mandrel bent aluminum piping and heavy duty silicone couplers replace restrictive factory plumbing to improve airflow, lower EGTs, and boost turbo response. Key Features 3. 00" mandrel bent aluminum piping for smoother bends and increased flow Multi layer silicone couplers oil resistant, heat and