https://www.flexolite.co.uk/products/fa056-riley_rmb_2_1_2_litre_tecalemit_fa2022_head_to_1953-fa056
FA056: Riley RMB 2 1/2 litre (Tecalemit FA2022 head) to 1953 for Classic & Vintage Cars | Vintage...
Spin on oil filter conversion kit - includes adaptor plate and spigot bolt (3/4"BSF male to head, 3/4"UNF to filter), two sealing rings, copper washer
riley rmbclassic vintagelitretecalemithead