Get up to $4 back on Bosch Spark Plugs with this mail in rebate, while supplies last. Bosch Iridium spark plugs are engineered for high performance and long life, using the best in OE technology. Bosch Iridium's ultra-fine wire center electrode design improves ignitability, lowers voltage demand, and delivers up to 4x longer service life versus standard copper core plugs. The laser-welded iridium-platinum alloy inlay on the ground electrode resists cracking and potential loss for improved durability. Expires Aug 31, 2013

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