Silicone CAC Hose HOT,High Temp 4-ply Aramid Reinforced,2-3/4" ID,7 1/2" Long HPS 2-3/4" (70mm) x 7 1/2" Long High Temp 4-ply Aramid Reinforced Silicone Charge Air Cooler CAC Hose Coupler Hot Side Bellow meet and exceed SAEJ20 industry standards, designed and engineered to provide a connection between engine mounted charge air system components.