Cobra Head Reducing Elbow 5" ID to 4" ID

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 air flow.

How does the cobra head make such a tight bend without increasing turbulence? Because it flares out, creating more volume internally without increasing length.

Use a cobra head anywhere a standard or short-radius elbow will not fit. Temp rated at 250-275F. 

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

CA Residents: WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

90CB50R40

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