it can be a tad too long and it will compress some to make a good seal. too long and it will compress too much and may cause a restriction. cutting to fit just right may take a couple times but it makes a better seal, with out having the stock rubber Oring, the 1/4 tube fits directly on the valve . when you do the tube, look at the barrel side, dry fit in the hole, you may have to square the hole or round the tube . but with the tube , it does make a better fit.
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