5" ID to 4" ID x 90 Degree Rubber Cobra Head Reducing Elbow

5" ID to 4" ID x 90 degree rubber cobra head reducing elbow. This version is 5" ID on the short end and 4" ID on the long end. (For 4" on the short end, see the 4" ID to 5" ID version.)

Cobra head elbows are used when clearance is extremely limited, such as when an air cleaner outlet is up against a firewall. There is no other way to make a really tight bend without losing airflow.

How does the cobra head make such a tight bend without increasing turbulence? It flares out, creating more volume internally without increasing length. Use a cobra head anywhere a standard or short-radius elbow will not fit.

Temperature rated at 250-275°F.

Recommended clamps: 94100-0450 on the small end and 94100-0550 on the big end.

To make clamp installation easier, remove the locknut, align the clamp while holding it in place, then screw on the locknut to catch the first few threads.

Part #: 90CB50R40B