Threw an EZ on my truck today. Prior to the EZ, I was getting around 22psi boost. I was planning on adding a J hook after I got the EZ installed. However...Once I got the ez installed, I took a 4k trailer down the road (no j hook) and was getting 28psi and pulled great! This is close to what I was after. Why would that happen without the J hook? I assume it's because of the boost fooler, but didn't expect to get it without the hook.