A thermo switch that'll kick on at 190-195 and off at 180-185.

 

Most of the aftermarket parts outfits carry both a preset thermo fan switch as well as an adjustable one

 

But usually the guy behind the counter has no idea what you're talking about when you ask for it and will probably tell you they don't have one. At least that's what they've done everytime I bought one. You should always look up the parts yourself and just bring in the part #'s

http://shop.advanceautoparts.com/web...CGRP2061A_____

 

try summit motorsports.