 "BRM Phase I" consisted of BRM camshafts and high compression cast pistons, and "BRM Phase II" added Mahle forged pistons, BRM forged conrods, small-end bushes and big-end bolts to the Phase I.When offered in assembled form, these engines carried a BRM name plate on a specially cast 'BRM' cam cover, but the actual assembly of these high performance 'BRM' road engines was carried out by Rubery Owen & Co. Ltd., an affiliated company of BRM through its ownership, not by BRM itself.The Special Equipment ('S/E') engines had camshafts developed by Cosworth (CPL1 - Cosworth Production Lotus) with 22/62/62/22 timing and 0.349" lift, called 'L1' cams.