High quality 817M40 forged steel conrod set. Lightweight 6" long Cooper 'S' conrod ONLY FOR USE with special race pistons using 18mm gudgeon pins. Conrod weight 450g. Bolts used are ARP 2000 bolts available as C-AEG518. Manufactured in the UK by Arrow Precision Engineering (and MINI SPARES branded) to correct lightest safe weight for rod stresses.