Quote: hi everyone been runing the champions rj12yc which edelbrock recomends but they're getting a rust color on them my specs on my engine are 440 .55 over 11 1/2-1 bme aluminum rods .620 solid roller 6 barrel set up with orange box ignition msd coil and wires never had this color before any help thanks guys
If you are saying you have a 11.5-1 motor. That is too hot of a plug. You should be in the 9 range. The rust spots are from detontation.
