Killer chiller works as it should its the newest version its larger than the old one and has more rows in side it, the single 255 is rated up to 550 hp which with a stock SC is probably not happening and the meth injection increases octane to protect from detonation. All do what they are supposed to do the stage 3 version just offer more options on how the injection system works either off boost or injector pulse or both. My intercooler Temps are in the 40 degree range so I get no heat soak at all and I can run my ac in the truck at the sameStage this garbage that
Learn what the mods mean
Meth is uncommon on these .
The killer chiller is hit or miss and there are way better ways to spend your money
A single 255 is nowhere near enough pump. These trucks run dual 190's stock.