Removed my JLT engine mounted catch can and went with a UPR fender mounted one. Nothing wrong with the JLT, but with so many arguments for and against the use of them back when I bought it I didn't want to invest alot without seeing the effectiveness of them. Now that I’m a believer in their use I thought I would try a more sophisticated one. Again, JLT collected plenty of oil but UPR seems more like a machine with lots of media to condense and remove the oil mist. I also like the fender mount better as its out of the way, and said to be more effective.