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  • · Registered
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    1,963 Posts
    hey man, the hypermax o-ring kit is still going good. I had the heads machined for the o-rings and installed them back in 2006. At that time the truck had roughly 43K miles on it...now the truck has almost 66K miles on it. I've truck pulled it a few times and dragged it a couple times also. Don't get on hard too much, just kinda cruise with it. It's seen near 40 a few times, but mostly the most it sees is little over 30psi.

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    17 Posts
    whats up dude, im just curious about fire ringing the heads , how are they holding up in ur truck and what kind of boost are u hitting..
    i just want some thing proven
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