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  1. #1
    jcc011185's Avatar
    Join Date
    Sep 2006
    Kannapolis NC (north of Charlotte)

    99 ultra 150 CDI.. now where do I get the NGK R6918C-9 spark plugs?

    Hey everyone.. I just bought a 99 (verified) CDI that I'm going to play with and see how much gain I get on my 00 ultra 150.. but I'm having real trouble finding the R6918C-9 spark plugs for what I've heard they go for like $12-$13 a piece.. sure I've found them.. but I found a box of 4 for like well over $100! ...Which needless to say is absolutly out of the question!

    Can anyone lead me in the right direction?


  2. #2

    Join Date
    Oct 2006
    Central Tx


    I had bob Shreadmaster Talk me into the 99 CDI .. But I have talked with a few guys that went to the Factory pipe CDI box route... even with a single pipe and stock carbs... but lets see the results.... Sorry to hijack your Thread about plugs.. but post up your results... I expected 1.5mph ...

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