Drag Specialties BPR4ES-11 Spark Plug For Harley Motorcycles 1975-1999 Options:'75-'99 Big Twin | 2103-0198 | 2103-0198 Easily change & upgrade tunes

Easily change & upgrade tunes as you upgrade exhaust and air cleaners

Gold Valve pistons

2013 Harley-Davidson Electra Glide Ultra Classic FLHTCUI 1999-2000 Harley-Davidson Dyna Convertible FXDS-CONV 1999-2001

excellent brake feel and easy modulation

map position (when using map switch)

Drag Specialties BPR4ES-11 Spark Plug For Harley Motorcycles 1975-1999 Options:'75-'99 Big Twin | 2103-0198 | 2103-0198 Easily change & upgrade tunesFeatures Plugs have a unique look with a 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 the insulator eliminates flashover Nickel plated housing prevents oxidation and corrosion Multi layer gaskets and heat crimping process ensure a leak free, gas tight seal Copper core electrode prevents oxidation and corrosion, has good electrical