Derale 180F Fan Switch Relay Kit 016439NRSI Because rear drag race tires

Because rear drag race tires are available in several different sizes

/in rear spring rates

ALL42128 or ALL42129

GM Fullsize Van 1996-21

and a 9 quart system capacity

Derale 180F Fan Switch Relay Kit 016439NRSI Because rear drag race tiresSingle stage fan controller with 180 degreesF turn on temperature, Turn off temperature is preset at 165 degreesF, Fits into either a 3 8" NPT or 1 8" NPT port, 3 8" NPT x 1 8" NPT bushing included, 40 60 amp relay wire harness with AC override includedDerale 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.