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  1. #1

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    Question 2006 STX15 f valve cover breathers?

    I see that Riva and R&D use to make covers to block off the two breathers on the valve cover on my 2006 stx15f. Now they are no longer used on the newer 15F,s Is it worth the time to make a couple of these? Did anybody see a performance gain after installing these covers? Thanks Guys for your reply.


  2. #2
    RLACEMAN's Avatar
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    Aug 2011
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    No gain in performance, just looks nicer in the engine compartment.

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