E3.66 E3 Premium Automotive Spark Plugs
5 year or 100,000 miles Warranty
E3.66 is a 14mm, 1.000" reach plug with a tapered seat. It fits a wide variety of late model applications, especially Hemi applications. E3.66 is widely stocked in automotive retail stores. E3 automotive plugs have three legs securing the DiamondFIRE electrode to the shell. This allows for excellent heat transfer and helps to create more turbulence in the cylinder. The patented DiamondFIRE side wire is proven to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use. The unique ground electrode and a full-size center electrode also provides optimal performance for a guaranteed five years or 100,000 miles.
- Part Number: E3.66
- Resistor: Resistor
- Hex Size: 5/8"
- Thread Reach: 1.000"
- Thread Diameter: 14mm
- Seat: Taper
- Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted