SRM's Magnetic Sumpfilter Kit For Singles
Sump filter kit for BSA B31 B33 ZB DBD M20 M21 models,
CNC machined billet with Stainless steel drain plug with
integral magnet, gauze plate, gaskets and stainless steel
fixing bolts.The drain bolt makes oil changes easier and
quicker, the magnet collects cast iron and steel deposits
making the oil cleaner and helps prolong engine life.
SRM part number is SRMSF2