Is it a waste of $$ and/or time? Depends on how you view the issue of engine temps - you don't NEED a 180 t-stat; not having one won't adversely affect performance (it does come with the higher temp t-stat stock and these cars are good in performance to begin with). Likewise if you have one and don't adjust the fan speeds - it won't hurt anything. I put one in to run cooler temps any time I'm in traffic - most agree that "cooler is better" in most cases as it relates to overall performance. Even in the winter months when the outside temps are in the 30s, I've noticed my temps running over 200 if I'm in any traffic (the temp drops quickly once I'm out of it, however). I'm happy with the result. My SRT8 does run about 20 degrees cooler than before the install - especially if I'm in any traffic, and I like that. I've noticed a slight improvement in gas mileage after the install, as well as a very slight improvement in throttle response. Did I need it? No, but I didn't need any of the other mods - I just wanted some enhancements over stock performance, so I installed the 180 t-stat as part of my overall "mod package" as a practical solution in lowering my temps when I'm in traffic. I don't race, go to the track, etc. - just drive it daily, and the 180 t-stat fit in with what I was looking to accomplish in conjunction with my other mods. Its a pretty simple install too - and an under $40 mod (that's only if you go with the JET - others cost less).