a few tuning problems, but just because initially i was trying to get some milage out of it. i gave up and put the pressure where it likes it. i may change to 24lb, as it may drive better when cold. but it works fine. i had the pressure so high at first it blew BLUE flames out of the end of the exhaust. so even with 19lb stockers you will be able to push enough through it. you have to have adjustable regulator. mine is rebuildable billet. works great. after racing season opens i'm going to change them to see how it runs. i am running 50psi right now. a little high maybe, but so what. use your rails.