NGK Iridium IX Spark Plugs dyna Seat features a combination of

Seat features a combination of progression density form and SaddleGel inserts for superior driver and passenger comfort

Built for aggressive riding and daily use

Knurled grip rubber

2011 - FXDWG Dyna Wide Glide

NGK Iridium IX Spark Plugs dyna Seat features a combination ofSold as a set! Twin Cam & XL include 2 M8 includes 4 Ultimate Performance! Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling. Fine Iridium tip ensures high durability and a consistently stable spark Iridium alloy has extremely high melting point, perfect for today's high tech, high performance engines Trivalent metal plating provides superior anti