<P><STRONG>Champion RJ8C / CCH871 COPPER PLUS Spark Plug Replaces MR45</P></STRONG><P><STRONG>When its time to replace the OE spark plugs in your vehicle, mower or weed whacker, Copper Plus® rises to the occasion.</P> <LI>Copper-core center electrode</LI> <LI>Patented Ultraseal™ coated shell for maximum corrosion resistance</LI> <LI>Patented SAC-9 semiconductor resistor</LI></STRONG><P><STRONG>If 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.</P></STRONG>