Spark Plug Wire Set-Base MSD 31193manufacturer part number : 31193 spark plug boot material : Silicone and Synthetic product shipping template : Migrated Template brand : MSD Ignition rfi suppression : Yes assembled : No includes coil wire : Yes wire material : Silicone and Synthetic mpn : 31193 distributor terminal ends : HEI number of wires : 8 wire resistance : 40 To 50 Ohms Per Foot Resistance diameter (mm) : 8.5 Millimeter california prop 65 warning : This product can expose you to chemicals which are known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information visit www.P65Warnings.ca.gov color : Black spark plug boot ends : Straight spark plug boot color : Gray distributor boot color : Gray conductor type : Copper Alloy With Ferro Magnetic Impregnated Center Core upc : 85132311934