This Mishimoto factory-fit hot-side upper boot replaces the OEM hot-side upper pipe on 2003–2007 Ford 6.0L Powerstroke engines, engineered for a precise fit. It uses DuraCore synthetic inner material and multi-layer silicone with embedded heat-resistant fibers to resist heat, pressure, fuel and oil, and includes constant-tension T-bolt clamps. The boot is intended to improve durability and airflow over the factory piece.
Mishimoto 03-07 Ford 6.0L Powerstroke Factory Fit Boot - Hot Side Upper Boot