The Copper Core Spark Plugs Evo High Performance by ACCEL are a game-changer in the world of spark plugs. With a unique design that creates a considerably hotter spark, these spark plugs allow the flame to expand more rapidly in the combustion chamber. This innovative design also prevents the spark from being shrouded by the ground strap, giving the flame an unblocked area to grow and creating a larger flame front for a more complete burn.

One of the key benefits of the Copper Core Spark Plugs Evo High Performance is the reduction of excess heat absorption of the electrode and ground strap, also known as the “quenching effect”. This reduction helps prevent misfiring, rough idle, and overall poor performance. Additionally, these spark plugs produce a larger spark nucleus without having to increase the spark gap, resulting in a more complete burn of the air-fuel mixture. This leads to increased performance, improved throttle response, greater fuel efficiency, and reduced emissions.

The Copper Core Spark Plugs Evo High Performance are designed to fit a wide range of Harley Davidson models, including the FLH Electra Glide, FLHR Road King, FLHS Electra Glide Sport, FLHT Electra Glide, FLST Softail Heritage, and many more. With their high performance and durability, these spark plugs are a must-have for any motorcycle enthusiast looking to enhance their ride.

Features:

• ACCEL C-Cut Copper Spark Plugs creates a considerably hotter spark that lets the flame expand more rapidly in the combustion chamber
• Allows spark to expand directly above the midpoint of the electrode core – preventing the spark from being shrouded by the ground strap
• Gives the flame an unblocked area to grow – creates a larger flame front for a more complete burn
• Reduces excess heat absorption of the electrode and ground strap, also known as the “quenching effect”, which leads to misfiring, rough idle and overall poor performance
• Produces a larger spark nucleus without having to increase the spark gap
• Creates a more complete burn of the air-fuel mixture resulting in increased performance, improved throttle response, greater fuel efficiency and reduced emissions

Fitment:
Harley Davidson FLH Electra Glide 1984
Harley Davidson FLH Electra Glide 1985
Harley Davidson FLHR Road King 1994
Harley Davidson FLHR Road King 1995
Harley Davidson FLHR Road King 1996
Harley Davidson FLHR Road King 1997
Harley Davidson FLHR Road King 1998
Harley Davidson FLHRC Road King Classic 1998
Harley Davidson FLHS Electra Glide Sport 1987
Harley Davidson FLHS Electra Glide Sport 1988
Harley Davidson FLHS Electra Glide Sport 1989
Harley Davidson FLHS Electra Glide Sport 1991
Harley Davidson FLHS Electra Glide Sport 1993
Harley Davidson FLHT Electra Glide 1986
Harley Davidson FLHT Electra Glide 1995
Harley Davidson FLHT Electra Glide 1999
Harley Davidson FLHTC Electra Glide Classic 1984
Harley Davidson FLHTC Electra Glide Classic 1985
Harley Davidson FLHTC Electra Glide Classic 1988
Harley Davidson FLHTC Electra Glide Classic 1990
Harley Davidson FLHTC Electra Glide Classic 1992
Harley Davidson FLHTC Electra Glide Classic 1993
Harley Davidson FLHTC Electra Glide Classic 1997
Harley Davidson FLHTC Electra Glide Classic 1998
Harley Davidson FLHTC Electra Glide Classic 1999
Harley Davidson FLHTCU Electra Glide Ultra Classic 1989
Harley Davidson FLHTCU Electra Glide Ultra Classic 1991
Harley Davidson FLHTCU Electra Glide Ultra Classic 1992
Harley Davidson FLHTCU Electra Glide Ultra Classic 1994
Harley Davidson FLHTCU Electra Glide Ultra Classic 1995
Harley Davidson FLHTCU Electra Glide Ultra Classic 1998
Harley Davidson FLHTCU Electra Glide Ultra Classic 1999
Harley Davidson FLHX Electra Glide Special 1984
Harley Davidson FLHX Electra Glide Special 1985
Harley Davidson FLST Softail Heritage 1987
Harley Davidson FLST Softail Heritage 1988
Harley Davidson FLST Softail Heritage 1989
Harley Davidson FLST Softail Heritage 1990
Harley Davidson FLSTC Softail Heritage Classic 1989
Harley Davidson FLSTC Softail Heritage Classic 1991
Harley Davidson FLSTC Softail Heritage Classic 1992
Harley Davidson FLSTC Softail Heritage Classic 1994
Harley Davidson FLSTC Softail Heritage Classic 1996
Harley Davidson FLSTC Softail Heritage Classic 1998
Harley Davidson FLSTF Softail Fat Boy 1990
Harley Davidson FLSTF Softail Fat Boy 1992
Harley Davidson FLSTF Softail Fat Boy 1994
Harley Davidson FLSTF Softail Fat Boy 1995
Harley Davidson FLSTF Softail Fat Boy 1997
Harley Davidson FLSTF Softail Fat Boy 1998
Harley Davidson FLSTN Softail Heritage Special 1996
Harley Davidson FLSTN Softail Nostalgia 1993
Harley Davidson FLSTN Softail Nostalgia 1994
Harley Davidson FLSTN Softail Nostalgia 1995
Harley Davidson FLSTS Softail Heritage Springer 1998
Harley Davidson FLSTS Softail Heritage Springer 1999
Harley Davidson FLTC Tour Glide Classic 1984
Harley Davidson FLTC Tour Glide Classic 1985
Harley Davidson FLTC Tour Glide Classic 1986
Harley Davidson FLTC Tour Glide Classic 1988
Harley Davidson FLTC Tour Glide Classic 1991
Harley Davidson FLTC Tour Glide Classic 1992
Harley Davidson FLTCU Ultra Classic Tour Glide 1990
Harley Davidson FLTCU Ultra Classic Tour Glide 1992
Harley Davidson FLTCU Ultra Classic Tour Glide 1995
Harley Davidson FLTCU Ultra Classic Tour Glide 1996
Harley Davidson FLTR Road Glide 1998
Harley Davidson FXD Dyna Super Glide 1996
Harley Davidson FXD Dyna Super Glide 1998
Harley Davidson FXDC Dyna Super Glide Custom 1992
Harley Davidson FXDL Dyna Low Rider 1995
Harley Davidson FXDL Dyna Low Rider 1996
Harley Davidson FXDL Dyna Low Rider 1998