E3.108 is a 14mm, 0.708” reach plug with a 5/8” hex and a taper seat.
It is built to have a cold heat range, non-resistor, and is used a
variety of racing applications. E3 racing plugs are fitted with its
patented DiamondFIRE ground electrode, which is secured with two legs to
the shell. This allows for excellent heat transfer, and provides
additional stability to the side wire in these high RPM engines. The
unique DiamondFIRE ground electrode is proven to increase power, reduce
fuel consumption and improve hydrocarbon emissions in long-term use. The
E3 ground electrode and full-size center electrode also provides
optimal performance over an extended product life.
CROSS-REFERENCE
Autolite AR473, AR474
Champion 286, 683, S59C, S61C
