I have a aftermarket CSF radiator, you need to make sure you cut your upper radiator hose because aftermarket radiators are thicker and the hose will push the ets cover into the pulleys, and you don't want that happening while they are turning, I probably cut about ½ a inch off of the end of the hose that connects to the upper radiator, it fits perfectly. ETS is the best and I also have their front mount intercooler kit and exhaust.