Denso Iridium Spark Plug K16PSR-B8 / K16PSRB8 / 3437 Replaces FR5EIDenso Iridium Spark Plugs are designed for drivers who care about performance. They deliver increased acceleration and torque compared to regular spark plugs. For most applications you can choose between Denso Iridium OEM, Denso Iridium Power Plugs or the Higher Mileage Denso Iridium Tough Plugs.Superb ignitability Low required voltage Better acceleration response and operational stability Lower fuel consumption Longer lifetimeDIMENSIONS: Height (mm): 43 Width (mm): 24.5 Length (mm): 85If you are unsure as to whether this is the correct part for your vehicle, please don\'t hesitate to contact us. Alternatively please use the cross reference table above.