Derale 16" Dyno-Cool Curved Blade Electric Fan 1980cfm # DER-18916 Rate_15 They activate the electric fans

They activate the electric fans when fluid temperatures reach 180 degrees F

and when compressed

Valve Cover Breather

Optionally

Mounts alternator on passenger side cylinder head and works great for all BBC engines including tall deck engines or applications and electric water pump

Derale 16" Dyno-Cool Curved Blade Electric Fan 1980cfm # DER-18916 Rate_15 They activate the electric fansDerale 16" Dyno Cool Curved Blade Electric Fan 1980cfm # DER 18916 16" Dyno Cool Curved Blade Electric Fan Fan Kit Specifications: Fan Size: 16" CFM: 1980 Amp Draw: 17. 3 Width: 16 1 2" Height: 15 5 8" Depth: 1 1 8" Overall Depth: 3 5 8" Mounting: 14" 1 8 x 8 1 8" Airflow: Pusher (Reversible)