Derale Rigid Race Mechanical Cooling Fan - 13" Fan - 6 Blade - 5/8" Pilot - Universal Bolt Pattern - Steel Hub/Aluminum Blades - Black/Natural H77403FXL 7/8-9 in Thread

7/8-9 in Thread

3 in Center Inlet

1958-1974 Oldsmobile 98

3" End has 9/16" Hole That Will Accommodate a 1/2" Bolt

Derale Rigid Race Mechanical Cooling Fan - 13" Fan - 6 Blade - 5/8" Pilot - Universal Bolt Pattern - Steel Hub/Aluminum Blades - Black/Natural H77403FXL 7/8-9 in ThreadAluminum fan blades, Maximum full time airflow, Rated up to 8,000 RPM, 13" standard rotation rigid fan design, Perfect replacement for fan clutch and fanDerale has been the leader in performance cooling for decades. Derale prides themselves in manufacturing high quality, high performance cooling products for O. E. M. and aftermarket applications. Whether you require cooling for the street, strip, track or off road Derale offer a wide variety of