I'm having problems with my headers melting the spark plug cap on number 8 cylinder. Is header wrap electrically conductive? I figure that this may help.

Thanks in advance

 

Header wrap will soak up oil over time and be a fire hazard. I would suggest getting some heat resistant wires like the Accel 9000s.

 

^--- What he said.

Header wrap is a bad idea. You could also put shielding around the plug wire along with Accel 9000s.

Header wrap can also rust your headers through and cause holes.

 

the only way they would melt that cap is if they were touching.

a nice solution is to use spark plugs that have a shorter ceramic "tower".

ACCELs are shorter.... as are most AC delco plugs.... just look for "header" or "Shorty" plugs and you'll find several.