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Part No.: 3631-Diameter-Length
High Temperature Silicone 2-ply Air Duct Hose, Orange
Silicone Rubber Air Duct Hose is popular for brake cooling ducts due to its high temperature capability (maximum 500° F continuous / 600° F intermittent). The 2-ply construction withstands higher pressure and vacuum than our Single-Ply Silicone Air Duct Hose (Part No. 3621), so it is popular as engine intake plumbing on normally-aspirated applications. This hose is flexible and pliable, but a bronze coated spring-steel wire support helix prevents it from collapsing. The fiberglass fabric cover and fiberglass cord are both impregnated and coated with silicone rubber. Lengths can be screwed together to form a continuous length if you've got leftovers around. Red-orange only.
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Note: These ducts are manufactured in 12 foot nominal lengths but only measure 12 feet when stretched tightly. The actual lengths will generally measure several inches less than nominal. |
| Lined Silicone Air Duct Hose Pressure and Vacuum Limits |
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| Diameter | 2 inch | 2.5 Inch | 3 Inch | 4 Inch | 5 Inch |
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| Pressure | 22 psi | 21 psi | 19 psi | 16 psi | 13 psi |
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| Vacuum | 20 in Hg | 18 in Hg | 16 in Hg | 12 in Hg | 9 in Hg |
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