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Most of time ring's service life from unmarked kit are similar to name brand's regular grade BUT http://www.mychinamoto.com/forums/showthread.php?8624 show it went :hellfire: from day 1
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U need the flat (ie. Suzuki & clone after 00's 10mm "C" spark plug) variety
http://www.engtaobao.com/item/528400923455.html & SAL seems the most economic way to buy such kit...