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  1. #1

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    Anyone installed rive valves/valve springs in the 300x?

    Just curious the results,They have been out for a while and no one ever mentions changing out the internals on the 300x.There have been several guys on here that have gone through there 300x engines but i have yet to read what internals they went back with either OEM or after market,,,There are a lot of after market goodies out there like Stainless valves,HP valve springs,JE pistons,Amarilla rods surely someone has installed these by now. any performance gains with these items?


  2. #2
    Banned User
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    Quote Originally Posted by jeff007 View Post
    Just curious the results,They have been out for a while and no one ever mentions changing out the internals on the 300x.There have been several guys on here that have gone through there 300x engines but i have yet to read what internals they went back with either OEM or after market,,,There are a lot of after market goodies out there like Stainless valves,HP valve springs,JE pistons,Amarilla rods surely someone has installed these by now. any performance gains with these items?
    Read my threads on my builds I posted most info u seek

  3. #3
    Olomana's Avatar
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    Click image for larger version. 

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    I did found the ski revving faster, after rebuild.
    Each hole shot, RPM was all over the limiter with stock tune and prop.
    Acceleration was picking up like crazy.

    Less rotating mass ftw!

  4. #4
    jimmy71's Avatar
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    Now that's a pretty sight Olomana

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