Silicone CAC Hump Hose HOT,High Temp 4-ply Aramid Reinforced,4" ID,10" Long HPS 4" (102mm) x 10" 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.