Silicone CAC Hump Hose HOT,High Temp 4-ply Aramid Reinforced,4" - 5" ID,7" Long HPS 4" - 5" (102mm - 127mm) x 7" 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.