can gear - single row Replacement/Upgrade The single row cam sprocket was used as a mass-reducing upgrade for earlier M10 engines and as stock replacement for later M10s. If switching to a single-row configuration from a dual-row, you'll also need the matching single-row crankshaft sprocket and timing chain. We like these on race engines. Price: $70.19   Quantity to Add:   CONTACT US AT BMWSALES@2002AD.COM 1-800-4-2002AD 909-629-1955 outside of the USA COPYRIGHT © 2002 AD, ALL RIGHTS RESERVED.