Namz, 18mm to 12mm exh. sensor bung reducer set - 12-17 Softail, Dyna (with pre-2012 exhaust) (NU); Other applications were 12mm sensors are used for 18mm holes 917229 Designed to fit the batwing

Designed to fit the batwing fairings as found on FLHX

Used in the workshop to rotate the engine by momentarily activating the starter for service or adjustments

Note: Use MCS 502616 JIMS shaft for all 70-99 aftermarket flywheels that have keyway and 6° taper

derby & inspection cover gaskets and o-rings

Namz, 18mm to 12mm exh. sensor bung reducer set - 12-17 Softail, Dyna (with pre-2012 exhaust) (NU); Other applications were 12mm sensors are used for 18mm holes 917229 Designed to fit the batwingUsed in custom applications to reduce exhaust sensor thread from 18mm to 12mm so late H D models, equipped with 12mm O2 sensors, can be used with earlier 18mm sensor style exhausts. Note: For Touring models an extra extension cable is required, which is available as 578303 bung set & cable extension kit.