Fitments
12-17 Softail, Dyna (with pre-2012 exhaust) (NU); Custom applications to reduce 18mm O2 sensor holes to 12mm
Part Description
NAMZ, 18mm to 12mm exhaust sensor bung reducer set
Used in custom applications to reduce exhaust sensor thread from 18mm x 1.50 to 12mm x 1.25 so late H-D models, equipped with 12mm O2 sensors, can be used with earlier 18mm sensor style exhaust systems. Note: For 10-16 Touring models an extra extension cable is required, which is available as 578303 bung set & cable extension kit.
