Durable 4-Ply Construction: Built with four layers of high-quality silicone, providing exceptional strength and flexibility in challenging conditions. Temperature Range: Capable of operating from -25°C to 220°C, making it reliable in extreme hot and cold environments. Perfect Fit: The 2.5" (63mm) diameter offers a secure and stable connection for various automotive applications. High Heat & Pressure Resistance: Engineered to perform under high pressure, making it suitable for high-performance use. Customizable Colors: Available in black, red, blue, and other colors to suit your aesthetic needs. The SIERRA Automobile 2.5" (63mm) Silicone High Performance 4-Ply Transition Coupler is crafted to provide top-tier performance and durability in high-demand automotive applications. Designed to connect components with precision, this coupler features robust 4-ply silicone construction, ensuring it withstands high pressures and temperatures, from -25°C to 220°C. Ideal for custom setups, this coupler allows smooth transitions while optimizing airflow.