NGK caps are designed to reduce electro-magnetic interference and radio frequency interference, which can affect electronic ignition components, causing misfires and poor engine performance. They may be required for power sport applications when spark plugs alone do not provide sufficient noise suppression.

• Spark Plug Cap - 8349
• Mfr. part number - 8349
• Highly durable phenolic resin & EPDM rubber
• Ceramic resistors ensure optimum performance & reliability
• Built to withstand extreme heat & vibration
• Prevents flashover
• 90-degree elbow type
• 10k ohm resistance
• 14mm plug thread
• Fits on terminal nut or solid post
• Weight: Approximately .66 pounds
• Shipping Dimensions: Approximately 4 x 2 x 1 inches.