| I got mine from NAPA, which I'm assuming are the same clamps - They look exactly the same. I installed them during the summer and have taken them off maybe once or twice. I over tigtened them a little, so I wouldn't have to worry as much when it got colder out. So far I have had to retighten only one of them. I actually had to retighten the same clamp twice. I think I over tightened too much - after tigtening it down, I reduced the fuel line diameter so far that it maxed out the clamp. I moved it over a little to a spot which hadn't been compressed and it hasn't leaked since. I dont really see the point in switching to a longer bolt. I feel like as long as these are tightened when the line is cold and at its minimum diameter (or slightly over tightened), they should be fine when it stretches and compresses again. I dont know if that minimum diameter changes after a couple cycles though.
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