HERE IS A GREAT IDEA TO COOL YOUR ENGINE! THE ADDITION OF THIS 2950 CFM 16" PERMA-COOL FAN TO YOUR 1989-1993 THUNDERBIRD SC/ XR7 IS PROBABLY THE BEST THING YOU CAN DO FOR YOUR SC. BY HELPING THESE NATURALLY HOT-RUNNING ENGINES RUN COOLER, YOU ARE GIVING YOUR ENGINE A BETTER SAFEGUARD AGAINST THE RISK OF BLOWING YOUR HEAD GASKETS. THE PERMA-COOL 16" TURBO FAN MOVES A MUCH GREATER VOLUME OF AIR ACROSS YOUR RADIATOR HELPING COOL FASTER UNDER EXTREME DRIVING OR HOT TEMPERATURES. WITH THIS FAN IS INCLUDED SPINNINGWHEELS-SC EXCLUSIVE "HOW-TO" WHICH HAS STEP BY STEP INSTRUCTIONS ON MOUNTING THIS FAN IN YOUR SC/XR7 FACTORY FAN SCHROUD, TO KEEP THE STOCK LOOK, YET GAIN IMPROVED COOLING. WHEN USING THIS LARGER COOLING FAN IT IS NECESSARY TO USE A THERMOSTATIC FAN CONTROLLER AS THIS FAN IS NOT COMPATIBLE TO BE WIRED INTO THE FACTORY FAN CIRCUIT. THE TERMOSTATIC FAN CONTROLLER WILL ALLOW YOU TO CONTROL AT WHAT TEMPERATURE THE FAN TURNS ON AND OFF. THIS THERMOSTATIC FAN CONTROL KIT CAN BE PURCHASED THROUGH US AT AN ADDITIONAL COST.