We are running the aeroquip black push lock fittings with glide with brake and had no problems in 3 years. I have been told if you use the blue hose you need to use the locking rings as the heat stretchs the blue hose. John

8.72 @ 154.6 ,68 Charger 578ci 440-1s, 3000# w/drvr, 2150 den/alt NA