High-Quality 4-Ply Construction: Reinforced with four layers of premium silicone, providing unmatched strength and flexibility. Optimal Temperature Range: Functions effectively in extreme temperatures, from -25°C to 220°C, making it suitable for various environments. Secure Fit: The 2.5" (63mm) diameter ensures a tight and reliable connection for a wide range of automotive applications. High Pressure and Heat Resistance: Designed for high-performance situations, ensuring durability under demanding conditions. Custom Color Options: Available in black, red, blue, and customizable colors to meet your design specifications. The SIERRA Automobile 2.75" (70mm) Silicone High Performance 4-Ply Transition Coupler is designed for automotive enthusiasts and professionals who require reliable, high-quality components for their vehicles. This coupler facilitates smooth transitions between components, ensuring seamless airflow and connectivity. With its robust 4-ply silicone construction, it offers superior durability and performance, withstanding high temperatures and pressures from -25°C to 220°C.