DRAG SPECIALTIES Spark Plugs - '57-'78 XL E18-6660SDS Passenger Floorboard Mount WAVE® design is much lighter

WAVE® design is much lighter than a stock rotor

the brow vent in the faceshield improves rider comfort while maintaining shell integrity and impact energy management performance

Consistently round and smooth shell

2015-2016 Harley-Davidson Road Glide Custom FLTRX - - 2010-2013 Harley-Davidson Road King Classic EFI FLHRC - - 2010-2013 Harley-Davidson Electra Glide Classic EFI FLHTCI - - 2010-2011 Harley-Davidson Street Glide Trike FLHXXX - -

DRAG SPECIALTIES Spark Plugs - '57-'78 XL E18-6660SDS Passenger Floorboard Mount WAVE® design is much lighterPlugs have a unique look with their black ceramic body and bold red logo script Insulator is made of 95% pure alumina; features strong resistance to heat shock and superior insulation Multi rib design of insulator eliminates flashover Nickel plated housing prevents oxidation and corrosion Multilayer gaskets and heat crimping process ensure a leak free, gas tight fit Copper core electrode prevents oxidation and corrosion and has good electrical and