We had problesm with like 4 new ones.The one on my kids 413 crapped out under 100 iles.have one on the shelf ZI bought for the 440 ysed it for like a mnoth Was crappy and was the hipo one.Went back to Holleys and never a problem Mine is like 15 years old now The first one I bought when they fiorst came out in yhe 70s ran for 30 years Still works just leaks