Brand: Pegasus Silicone Hose
Charge Air Cooler (CAC) hose is specifically designed to handle the higher temperatures and pressures in high-performance turbo and supercharged applications. Four layers of polyester reinforcement and 3 reinforcing rings allow operating pressures of 35 psi (142 psi burst pressure) and temperatures up to 350° F (180° C). Note that this temperature rating is best suited to the "cold" (post-intercooler) side of the system. This hose is color-coded Blue for easy identification.
This hose is a straight reducing coupler measuring 6 inches (150mm) long overall. It is designed specifically for connecting a 4" (102mm) OD metal intake pipe to a 3" (76mm) OD pipe, absorbing slight misalignment and vibrations. The 5mm wall thickness results in a 4.41" (112mm) OD at one end and 3 3/8" (86mm) OD at the other. Sold individually.
Note: Silicone hose is not compatible with liquid fuel or oil of any type! It will withstand exposure to an air-fuel mixture and will survive occasional oil spills, but constant exposure to pure petroleum will destroy the silicone rubber.