1. Stainless steel construction for solid and durable,Heat-resistant, rust-proof and anti-corrosion. 2. The internal substrates and precious metal loading have been carefully engineered for maximum efficiency and to avoid MIL code issues. 3. The honeycomb structure for maximum flow and surface area, that allows the catalysis to fully touch with exhaust gases without sacrificing flow rate. 4. Great emissions control, high efficient and work efficiently. 5. Fully tested under extreme condition for heat resistance and long-life use.