not want to take chances. I only dd my Z. I personally don't trust fan clutches. They put more stain on the water pump & take up alot of unnecessary space. W/an e-fan the fan is not on at highway speeds because of the faster moving air through the front grill.The t-stat is what controls the flow of coolant out of the rad. I have a dual core koyo rad, w/ ATI race damper which is over driven, billion high flow t-stat, coolant passages deflashed. I don't believe that the coolant flows out of the rad that fast. As soon as the e-fan kicks in it immediately cools the coolant the rad. There are alot of modern high pwr sports of to day that come oem w/ e-fans just look at some under the hood pics. You may be very surprised & think "how in the hell does something w/all that hp not overheat"? For those who dd there tt's & na's what do y'all want the engine fan to do? I only want it to cool whats in my rad; no other purpose & it does quickly. ..As for my a/c I did the mod the turn the smaller fan in front of the condenser on high when ever the a/c is on.