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
1964 DKW F12 Spark Plug - Autolite 386
Champion Spark Plug - Harley 6R12
Amazon.com: E3 SPARK PLUGS: HD 6R12 - Pair : Automotive
Amazon.com: E3 SPARK PLUGS: HD 6R12 - Pair : Automotive
W18 518 CHAMPION Industrial Spark Plugs
CHAMPION Spark Plug in the Small Engine Replacement Parts department at Lowes.com
Champion® 404 RN12YC Copper Spark Plug for V-Twins - Replacement for OEM# 5R6A on 1984-2000 Evolution and 1975-1980 Shovelhead (1200cc) Harley Motors - MADE IN USA - Billet Proof Designs
Screamin' Eagle Performance Spark Plugs | Harley-Davidson USA
CHAMPION SPARK PLUGS - Zodiac
Spark plug, Rax94Yc For Harley Davidson V-Rod and Buell - ChopperShop.com
Amazon.com: E3 SPARK PLUGS: HD 6R12 - Pair : Automotive
CHAMPION SPARK PLUGS - Zodiac
Champion® 404 RN12YC Copper Spark Plug for V-Twins - Replacement for OEM# 5R6A on 1984-2000 Evolution and 1975-1980 Shovelhead (1200cc) Harley Motors - MADE IN USA - Billet Proof Designs