Harley-Davidson Original Equipment Spark Plug | Harley-Davidson CA
NGK IRIDIUM IX® FOR V-TWIN ENGINES
Autolite® 4164 Copper Spark Plug for V-Twins - Replacement for OEM# 6R12 - Fits 1986-Up Sportster (XL) and 1999-2017 Twin Cam Harley Models and All 1988-2008 Buell Models - MADE IN USA - Billet Proof Designs