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  1. 1st Gen - Car Care, ...
    Has anyone used these? I recently bought a 2004 TSX (Auto w/Nav) that has 191k miles and am going to replace the current plugs. I plan to go with either the OE type NGK laser iridium or the NGK Ruthenium HX plugs. If anyone has used the Ruthenium HX, did you notice any difference?
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