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MINI Cooper Ignition Wires Instruction Manual

Magnecor manufactured ignition leads using its 7mm HIGH PERFORMANCE IGNITION CABLE . Lead sets (wire sets in USA) using this cable were very popular as a superior replacement for 7mm size original equipment and aftermarket ignition leads using limited-life carbon conductors and resistor/connectors at lead ends. Over the years, the wire-wound conductor was updated to provide better RFI suppression, and later versions achieved moderate EMI suppression. A small 7mm insulating jacket makes providing a wire- wound conductor to properly suppress EMI (needed by late model engines) both difficult and expensive. To suppress EMI, most manufacturers use leads with carbon conductors and resistor/connectors at lead ends. Although these leads deteriorate with use and spark current is reduced, manufacturers are not concerned, because they all treat ignition leads as service items to be replaced regularly.