Oil Galley Plug(Small) 1/8in.-28 British Thread - 20R/22R/RE/RET 0 Small Oil Galley Plug (1/8"-28 BSPT) Every 20R/22R/RE/RET block and crankshaft have numerous oil port locations that need to be plugged off. You will need two for the passenger side of the block... $1.64 Quick view add to cart Add Wish List add to cart