About 2 years ago I got a good deal on a new weapon x diff cooler kit, which I held off installing due to needing my rear differential being replaced under warranty. I never got around to installing the diff cooler kit, but as time has gone by, I'm not so sure I need one as I don't plan to track this car on a road course. I don't see many people running these for drag racing, and I don't plan to go any faster than low 10's/high 9's with my build. Am I better off selling the kit to fund other modifications?
Being the contrarian, I think a diff cooler is probably a great idea even on a STOCK V if the car will see any real highway use. Just cruising the interstate at 80-85 reportedly gets these diffs very very hot. Much hotter than other designs, for a couple of reasons. At this time I don’t have direct data but I DO plan to gather it soon.
In short, drag racing would be the ONE application where the cooler would not be indicated… but a cooler would likely be a great idea in every other venue, especially standing mile or roll racing.