The Vibrant 11821 is an aramid reinforced silicone charge air cooler hose coupler, 3.50 in inside diameter by 6.00 in long, in black. It uses three stainless steel rings to prevent excessive expansion of the hose under elevated pressure and compensates for minor misalignment while isolating vibration. High temperature resistant aramid fabric between each silicone layer gives an operating range of -75 degrees F to 392 degrees F, suiting hot and cold side water, coolant and air service.
- Type: 4-ply aramid reinforced silicone hose coupler
- Inside diameter: 3.50 in
- Length: 6.00 in
- Color: black
- Retaining rings: 3 stainless steel
- Wall thickness: 0.2 in
- Operating temperature: -75 to 392 degrees F
- Maximum operating pressure: 55 psi
- Part number: 11821
FAQ
What size is the 11821 coupler?
3.50 in inside diameter by 6.00 in long.
What is it used for?
It is suited to charge air cooler, boost, air, water and coolant service on hot or cold side.
What is the operating temperature range?
The aramid reinforced silicone handles -75 degrees F to 392 degrees F.

