Bosch Ir Fusion features a patented, fused iridium and platinum center electrode, combined with exclusive surface air gap firing technology to produce a longer, more powerful spark. Its four yttrium-enhanced ground electrode design outperforms OE iridium plugs by significantly reducing gap wear. Now available for $4.99 each through December 31, 2011, or while supplies last.Expires Sep 28, 2011

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