The HF100 series are made from a full stainless steel construction with integrated heat-shield and a high-flow metallic substrate designed to meet the EURO 3 EPA emission standard. The 100cpsi metal-core is the highest flowing available and is suitable for high power/race applications. Inlet/Outlet: 3.5" Body Size: 4" Body Length: 10. Check the store for 2.5" and 3" sizes, as well as direct bolt-on models. EURO 4 EPA emission standard models available for special order upon request.1x Kenobi HF100 3.5 Metal-Core Catalytic Converter. The item "Kenobi 3.5 Inch Metal Cat High Flow Metal Core 100 Cell Catalytic Converter" is in sale since Thursday, September 6, 2012. This item is in the category "Vehicle Parts & Accessories\Car & Truck Parts\Exhausts\Cat Converters". The seller is "pointblankauto" and is located in West Melbourne, VIC. This item can be shipped worldwide.